| Author: | Sweeney, John W. | 
|---|---|
| Additional Authors: | Hamlin, Howard Phillips, | 
| Year: | 1964 | 
| Document Type: | BMRA | 
| Issuing Agency: | U.S. Dept. of the Interior, Bureau of Mines, | 
| SUDOC: | I 28.23:6393 | 
| Series: | Report of investigations / Bureau of Mines ; | 
| Report Number: | 6393 | 
| Subjects: | Clay | 
| Building materials | |
| Loess | |
| Shale--Iowa | |
| Link: | https://hdl.handle.net/2027/mdp.39015077557224 |