| Author: | Duvall, Wilbur I. |
|---|---|
| Year: | 1961 |
| Document Type: | BMRA |
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, |
| Series: | Report of investigations / United States Department of the Interior, Bureau of Mines ; |
| Report Number: | 5708 |
| Subject: | Seismometers |
| Link: | https://hdl.handle.net/2027/mdp.39015078527366 |