United States. Bureau of Plant Industry, Soils, and Agricultural Engineering. (1945). Regional studies of time of planting and hill spacing of sweetpotatoes. [s.n.].
Chicago Style (17th ed.) CitationUnited States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Regional Studies of Time of Planting and Hill Spacing of Sweetpotatoes. [Washington]: [s.n.], 1945.
MLA (9th ed.) CitationUnited States. Bureau of Plant Industry, Soils, and Agricultural Engineering. Regional Studies of Time of Planting and Hill Spacing of Sweetpotatoes. [s.n.], 1945.
Warning: These citations may not always be 100% accurate.