Wheat. Handbook, official grain standards for wheat, shelled corn, and oats, tabulated and abridged description of official grain standards of United States for wheat and for shelled corn as established and promulgated by Secretary of Agriculture, Apr. 13, 1918, effective July 15, 1918, and for oats as established and promulgated Mar. 15, 1919, effective June 16, 1919; compiled by E. G. Boerner.