United States. Bureau of Plant Industry. (1937). Effect of fertilizers on composition of soybean hay and seed and of crop management on carbon, nitrogen, and reaction of Norfolk sand. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Plant Industry. Effect of Fertilizers on Composition of Soybean Hay and Seed and of Crop Management on Carbon, Nitrogen, and Reaction of Norfolk Sand. [Washington]: [s.n.], 1937.
MLA (9th ed.) CitationUnited States. Bureau of Plant Industry. Effect of Fertilizers on Composition of Soybean Hay and Seed and of Crop Management on Carbon, Nitrogen, and Reaction of Norfolk Sand. [s.n.], 1937.
Warning: These citations may not always be 100% accurate.