| Author: | Hee, Olman |
|---|---|
| Year: | 1969 |
| Document Type: | N/A |
| SUDOC: | I 28.27:8418 |
| Series: | United States Bureau of Mines Reports |
| Report Number: | I. C. 8418 |
| Subjects: | Phosphate rock -- United States. |
| Potash industries and trade -- United States. | |
| Nitrogen industries -- United States. | |
| Link: | http://digital.library.unt.edu/ark:/67531/metadc170810/ |