Microscopic study of Elkhorn coal bed at Jenkins, Letcher county, Ky.
By: by Reinhardt Thiessen, George C. Sprunk, and H.J. O'Donnell ...
Contributors: Sprunk, George C., 1905- joint author.; O'Donnell, Hugh J., 1910- joint author.; United States. Bureau of Mines.; American Gas Association.
Series: U.S. Bureau of mines. Technical paper,; 506
Publisher: U.S. Govt. print. off.
Published: 1931
Place of publication: Washington
Language: eng
Number of pages: 30
Subjects: Coal -- Kentucky -- Letcher County; Microscope and microscopy