USDA grade standards for food and farm products.

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Item Link Original Source
Full view   University of Virginia
Full view   no.533(1978) University of Illinois at Urbana-Champaign
Full view   no.533 REV.(1979) University of Illinois at Urbana-Champaign
Full view   no.533 REV.(1981) University of Illinois at Urbana-Champaign