| Author: | Gardner, E. D. |
|---|---|
| Year: | 1948 |
| Document Type: | N/A |
| SUDOC: | I 28.23:4269 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | R. I. 4269 |
| Subjects: | Oil-shales -- Colorado. |
| Mineral industries -- Colorado. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc38491/ |