Year: | 1923 |
---|---|
Document Type: | USBM |
Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines : |
SUDOC: | I 28.7:344 |
Series: | Technical paper / United States Department of the Interior, Bureau of Mines ; |
Report Number: | 344 |
Subjects: | Coal--Analysis |
Coal--Ohio | |
Link: | https://hdl.handle.net/2027/mdp.39015095082098 |