The grain bug - Caffrey, D. J.; Barber, George W. (George Ware), 1890-1948. (Washington, D.C. : U.S. Dept. of Agriculture, 1919)
"Professional paper."
"June 24, 1919."
Caption title.
Bibliography: p. 34-35.
Mode of access: Internet.
Keywords: Grain -- Diseases and pests