| Author: | Roman, Irwin. |
|---|---|
| Year: | 1931 |
| Document Type: | USBM |
| Issuing Agency: | U.S.Bureau of Mines, |
| Series: | Technical paper / United States. Bureau of Mines ; |
| Report Number: | 502 |
| Subjects: | Geophysics |
| Electric resistors--Tables | |
| Link: | https://hdl.handle.net/2027/mdp.39015077559782 |