The geology of the Pittsburgh coal region.
By: By J.P. Lesley.
Contributors: YA Pamphlet Collection (Library of Congress)
Published: 1886
Place of publication: [New York
Language: eng
Number of pages: 39
Subjects: Geology -- Pennsylvania.; Coal -- Pennsylvania.
Notes: Reprinted from Transactions of the American institute of mining and metallurgical engineers, v. 14.