| Author: | Tyler, Paul McIntosh, | 
|---|---|
| Year: | 1932 | 
| Document Type: | MAIN | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| Series: | Information circular ; | 
| Report Number: | 6597 | 
| Subject: | Minerals--Identification--Directories | 
| Link: | https://hdl.handle.net/2027/mdp.39015095085638 |