| Author: | Katz, S. H. | 
|---|---|
| Additional Authors: | Porter, Horace C., | 
| Year: | 1917 | 
| Document Type: | USBM | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.7:98 | 
| Series: | Technical paper / United States Department of the Interior, Bureau of Mines ; | 
| Report Number: | 98 | 
| Subject: | Coal--Testing | 
| Link: | https://hdl.handle.net/2027/mdp.39015077315946 |