Classification and Mapping of AgriculturalLand for National Water- Quality Assessment : National Water-Quality Assessment Program/mit 6 Tabellen
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| Place / Publishing House: | Washington : U.S. Government Printing Office, 1997 |
| Year of Publication: | 1997 |
| Language: | ### |
| Series: | U.S. Geological Survey Circular
1131 |
| Physical Description: | 70 S., Ill. |
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