visitor's guide to the geology of the National Capital area
Contributors: Johnston, Paul McKelvey, 1908-; International Mineralogical Association. General Meeting. 3d, Washington, D.C., 1962
Published: 1962
Place of publication: Washington
Language: eng
Number of pages: 32
Subjects: Geology -- Washington Metropolitan Area; Washington Metropolitan Area -- Description -- Guidebooks
Notes: "Abstracted from an unpublished report by Paul M. Johnston entitled 'Geology and ground water of the Washington, D.C. area' placed on open file in the United States Geological Survey on August 18, 1961."

Prepared for the third general meeting, International Mineralogical Association, April 17-20, 1962, Washington, D.C

Bibliography: p. 24-32