The Pittsburgh coal bed
Subtitle: its early history and development
By: by Howard N. Eavenson.
Publisher: American Institute of Mining and Metallurgical Engineers
Published: 1938
Place of publication: New York
Language: eng
Number of pages: 55
Subjects: Coal mines and mining -- Pennsylvania -- Pittsburgh.; Coal mines and mining -- West Virginia.; Coal mines and mining -- Maryland.; Coal mines and mining -- Ohio.
Notes: "Partial list of works consulted": p. 48-55.