Grain grading primer /
by Willis B. Combs and Fred G. Smith.
- Washington, D.C. : U.S. Dept. of Agriculture, 1953.
- 67 p. : ill. ; 23 cm.
- Agriculture handbook / United States Department of Agriculture ; no. 59 .
- Agriculture handbook (United States. Department of Agriculture) ; no. 59. .
Slight revision of Miscellaneous publication 325. Bibliography: p. 59-60.