Soil Survey of Polk County, Oregon
| Author | : United States. Bureau of Soils |
| Publisher | : |
| Total Pages | : 60 |
| Release | : 1927 |
| Genre | : Soil surveys |
| ISBN | : |
Soil Survey Of Polk County Oregon
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Soil Survey of Polk County, Oregon
| Author | : Clarence A. Knezevich |
| Publisher | : |
| Total Pages | : 322 |
| Release | : 1982 |
| Genre | : Soil surveys |
| ISBN | : |
Soil Survey of Polk County, Oregon
| Author | : United States. Department of Agriculture. Department of Soils |
| Publisher | : |
| Total Pages | : 64 |
| Release | : 1927 |
| Genre | : Soil surveys |
| ISBN | : |
Soil Survey of Marion County, Oregon
| Author | : Edward Fritchoff Torgerson |
| Publisher | : |
| Total Pages | : 68 |
| Release | : 1932 |
| Genre | : Soil surveys |
| ISBN | : |
