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| Collection: | Sierra Ancha Historical Images |
| Keywords: |
soil drainage |
| Location: | |
| Description: | Diabase soil-type |
| Date: | 05/1935 |
| Collection: | Sierra Ancha Historical Images |
| Keywords: |
soil erosion drainage |
| Location: | Prescott NF; AZ; USA |
| Description: | Watershed Project |
| Date: |
