United States. Soil Conservation Service. (1942). Using crop residues for soil defense. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Soil Conservation Service. Using Crop Residues for Soil Defense. [Washington]: [s.n.], 1942.
MLA (9th ed.) CitationUnited States. Soil Conservation Service. Using Crop Residues for Soil Defense. [s.n.], 1942.
Warning: These citations may not always be 100% accurate.