Poultry grading manual - Johndrew, O. F. (Orvis F.), 1909-; Hauver, W. E. (William Eugene), 1913-; Kilpatrick, Lester, 1903- (Washington, D.C. : U.S. Dept. of Agriculture, Agricultural Marketing Service, Poultry Division, 1959)
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Keywords: Poultry -- Grading