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Mining methods and costs, Iowa Gypsum deposits
| Author: | Marshall, Lawrence G. |
|---|---|
| Year: | 1959 |
| Document Type: | USBI |
| Issuing Agency: | Bureau of Mines, |
| SUDOC: | I 28.27:7909 |
| Series: | Information Circular / Bureau of Mines ; |
| Report Number: | 7909 |
| Subject: | Gypsum--Iowa |
| Link: | https://hdl.handle.net/2027/mdp.39015077563925 |
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