Pennsylvania, keystone to progress
Subtitle: an illustrated history
By: by E. Willard Miller ; pictorial research  by  Bromley C. Palamountain.
Contributors: Pennsylvania Chamber of Commerce.
Edition: 1st ed.
Publisher: Windsor Publications
Published: 1986
Place of publication: Northridge, Calif
Language: eng
Number of pages: 638
Subjects: Industries -- Pennsylvania -- History.; Pennsylvania -- Economic conditions.
Notes: Bibliography: p. 624-628.
"'Partners in progress' [i.e., "Keystone enterprises'] by Mark H. Dorfman, Margaret O. Kirk, and Janet Coury Smith": p. 418-621.
"Produced in cooperation with the Pennsylvania Chamber of Commerce."
Includes index.