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Commercial Grain Grading Au:Irwin, H.F.
Publication: Purdue Agriculturist
Subject: Grain Grading
Date: 2/1930
vol. 24, No. 5 p. 106
Publication: Purdue Agriculturist
Subject: Grain Grading
Date: 2/1930
vol. 24, No. 5 p. 106