The undeveloped mineral resources of Pennsylvania /

Bibliographic Details
Main Author: Ashley, Geo. H. (George Hall), 1866-1951
Format: Book
Language:English
Published: Harrisburg, Pa. : Department of internal affairs, Topographic and geologic survey, 1933.
Series:Bulletin (Pennsylvania. Bureau of Topographic and Geologic Survey) ; M18a.
Subjects:

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