The coal fields of the United States
Explore the source record for details and available documents.
Professional Paper↗
Geology topics
F. R. Clark
Publications and source records attributed to F. R. Clark.
Structure and oil and gas resources of the Osage Reservation, Oklahoma. T. 26 N., Rs. 9, 10, and 11 E.
Explore the source record for details and available documents.
Bulletin↗
The coal fields of Ohio, with a computation of the original coal content of the fields
No abstract available.
Ohio↗