 | Soil conservation. | (2) |
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 | Sericea lespedeza : its use and management / by Walter J. Guernsey. Guernsey, Walter J. 4n Washington, D.C. : U.S. Dept. of Agriculture, 1970. | |
| A manual on conservation of soil and water : handbook for professional agricultural workers. Washington, D.C. : U.S. Dept. of Agriculture, Soil Conservation Service, 1954. | |
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