United States. National Agricultural Statistics Service, United States. Department of Agriculture. Economic Research Service, & United States. Agricultural Statistics Board. (1990). Agricultural chemical usage. Agricultural Statistical Board.
Chicago Style (17th ed.) CitationUnited States. National Agricultural Statistics Service, United States. Department of Agriculture. Economic Research Service, and United States. Agricultural Statistics Board. Agricultural Chemical Usage. Washington, D.C.: Agricultural Statistical Board, 1990.
MLA (9th ed.) CitationUnited States. National Agricultural Statistics Service, et al. Agricultural Chemical Usage. Agricultural Statistical Board, 1990.
Warning: These citations may not always be 100% accurate.