| Author: | Fieldner, Arno Carl |
|---|---|
| Additional Authors: | Selvig, W. A. |
| Year: | 1930 |
| Document Type: | N/A |
| SUDOC: | C 22.12:3055 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | R. I. 3055 |
| Subject: | Coal -- Testing. |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc38382/ |