Question: At the age of 15, Martin P. Burks attended a university located in what Virginia county?

Context paragraphs:
Martin P. Loeb: Martin P. Loeb is the Deloitte & Touche Faculty Fellow and Professor of Accounting and Information Assurance (AIA) at the Robert H. Smith School of Business at the University of Maryland, College Park.  Loeb is also an affiliate professor in the University of Maryland Institute of Advanced Computer Studies (UMIACS).  Loeb received his Ph.D. from the Managerial Economics and Decision Sciences (MEDS) group at Northwestern University's Kellogg School of Management.  He received his BS in mathematics and economics from the State University of New York at Stony Brook.

Old Roanoke County Courthouse: Old Roanoke County Courthouse is a historic courthouse building located at Salem, Virginia.  It was built in 1909-1910 and is a three-story, Classical Revival-style, yellow brick building.  The front facade features a three-story, tetra-style Ionic order portico.  The courthouse has a hipped roof topped by a cupola, which is topped by an eagle.  A rear addition was built in 1948-1949.  Also on the property is the contributing 1910 Civil War Memorial, that consists of a granite shaft topped by the figure of a Confederate soldier.  The building housed Roanoke County, Virginia county offices until they moved to a new building in 1985.

Burks-Guy-Hagen House: Burks-Guy-Hagen House is a historic home located at Bedford, Virginia.  It was built about 1884, and is a two-story, brick dwelling in a Victorian Villa style.  It features a three-level square tower with a mansard roof and complex bracketed wooden gable with a hood or "apron".  It is set among romantically landscaped grounds and wood-bordered rear meadow.  The house was built for Judge Martin P. Burks (1851-1928).

Lawrence A. Gordon: Lawrence A. Gordon is the EY Alumni Professor of Managerial Accounting and Information Assurance at the University of Maryland’s Robert H. Smith School of Business.  He is also an Affiliate Professor in the University of Maryland Institute for Advanced Computer Studies.  Dr. Gordon earned his Ph.D. in Managerial Economics from Rensselaer Polytechnic Institute.  An internationally known scholar in the areas of managerial accounting (often called management accounting) and cybersecurity economics, Dr. Gordon's research focuses on such issues as economic aspects of information security (including cybersecurity or computer security), corporate performance measures, cost management systems, and capital investments.  He is the author of approximately 100 articles, published in such journals as The Accounting Review, ACM Transactions on Information and System Security, Communications of the ACM, Journal of Financial and Quantitative Analysis, Journal of Computer Security, MIS Quarterly, Accounting, Organizations and Society, and the Journal of Accounting and Public Policy.  Dr. Gordon's current research emphasizes the importance of applying concepts from economics and managerial accounting to an information-based economy.  Dr. Gordon is the co-creator (with Martin P. Loeb) of the Gordon-Loeb Model, which provides a mathematical economic model for deriving an organization's optimal investment level in cyber/information security.  The Gordon-Loeb Model has been featured in The Wall Street Journal and The Financial Times.  For a 3-minute video that provides a non-mathematical overview of the Model, go to: https://www.youtube.com/watch?v=cd8dT0FuqQ4.  Dr. Gordon also is the author of several books, including Managerial Accounting: Concepts and Empirical Evidence, Managing Cybersecurity Resources: A Cost-Benefit Analysis and Improving Capital Budgeting: A Decision Support System Approach.  In addition, he is the Editor-in-Chief of the Journal of Accounting and Public Policy and serves on the editorial boards of several other journals.  Dr. Gordon's research has over 6,400 citations in Google Scholar.

Martin P. Catherwood Library: The Martin P. Catherwood Library, commonly known as the Catherwood Library or simply the ILR Library, serves the New York State School of Industrial and Labor Relations at Cornell University.  One of over a dozen libraries within the Cornell University Library system, the Catherwood Library is considered the most comprehensive resource of its kind in North America.  The Catherwood Library's stated mission is to serve as a comprehensive information center in support of the research, instruction, and service commitments of the Industrial and Labor Relations School and Cornell community.  The Catherwood Library is an official Depository Library of the International Labour Organization (ILO), one of only two in the country to be so designated; the other is the Library of Congress.

Martin P. Burks: Martin Parks Burks (January 23, 1851 – April 30, 1928) (some sources give the date of his birth as 1850) was born in Bedford County, Virginia.  His father was Judge Edward C. Burks, who served on the Supreme Court of Appeals from 1876 to 1882.  Martin Burks attended Washington and Lee University when he was only fifteen years old.  He later entered the University of Virginia and graduated with a Bachelor of Law Degree.  In 1872, he was admitted to the bar and began practicing law in Bedford County in partnership with his father.  This partnership continued until his father became a member of the Supreme Court of Appeals.  The younger Burks remained in practice at Bedford until he returned to Washington and Lee in 1900 as a professor of law.  Three years later he was made dean of the law department where he stayed until he was elected to the Supreme Court of Appeals in 1917.  Judge Burks was on the court until he resigned on April 16, 1928, because of ill health.  He died shortly before his resignation became effective.  Because of his enthusiasm and extensive study of the law, Judge Burks wrote a monograph in 1893, which was published as Burks on Separate Estates.  This was adopted as a textbook by practically every law school in Virginia.  In 1913, his book on common law, Burks’ Pleading and Practice, was published.  It immediately became the authority to lawyers and jurists on the subjects it included, and it was also adopted as a textbook by the law schools in Virginia.

AAR type A switcher truck: The AAR type A switcher truck is a diesel locomotive truck introduced by EMD and installed as standard equipment on most EMD switcher locomotives and on those of other manufacturers.  It was designed by Martin P Blomberg and its US Patent was filed on Jul 6, 1937, and approved Nov 15, 1938 under .  It was designed for switcher service where the more complex high-speed passenger locomotive trucks were not needed.  The truck uses drop equalizers but does not have swing hangers as used on the Blomberg B and others.  A combination of coil springs, and leaf springs, positioned fore-and-aft inside the drop equalizers, give a good balance of damping.  The wheelbase is 8 ft .

Washington and Lee University: Washington and Lee University (Washington and Lee or W&L) is a private liberal arts university in Lexington, Virginia, (Rockbridge County) of the United States.

Maurice and Thelma Rothman House: Maurice and Thelma Rothman House is a national historic site located at 1018 Park Street North, St. Petersburg, Florida in Pinellas County.  It is an example of Mid-Century Modern architecture designed by the St. Petersburg architect Martin P. Fishback, Jr.

Edgewood Manor: Edgewood Manor is located in Clarksburg, West Virginia on the east side of US Route 19 and State Route 20 North just one-fourth of a mile off of the West Pike Street Exit off Route 50.  Another much older house of the same name, Edgewood (Bunker Hill, West Virginia), where a Confederate general died in 1863, is located far to the east in another West Virginia county.

Supporting paragraphs: Martin P. Burks Washington and Lee University
Answer: Rockbridge County