United States. Office of Experiment Stations. (1916). How teachers may use Farmers' Bulletin 693, Bur clover. U.S. GPO.
Chicago Style (17th ed.) CitationUnited States. Office of Experiment Stations. How Teachers May Use Farmers' Bulletin 693, Bur Clover. Washington: U.S. GPO, 1916.
MLA (9th ed.) CitationUnited States. Office of Experiment Stations. How Teachers May Use Farmers' Bulletin 693, Bur Clover. U.S. GPO, 1916.
Warning: These citations may not always be 100% accurate.