Grain grading primer /
[by Willis B. Combs and Fred G. Smith].

APA Citation

Combs, W. B. (Willis Becker)., Smith, F. G. (Fred George). (1948). Grain grading primer. Rev. Apr. 1948. [Washington, D.C.: U.S. G.P.O..

MLA Citation

Combs, Willis B. (Willis Becker), 1894-, and Fred G. (Fred George) Smith. Grain Grading Primer. Rev. Apr. 1948. [Washington, D.C.: U.S. G.P.O., 1948.