United States Department of Agriculture
www.usda.gov
Vegetables, Grading, Certification and Verification of Frozen Vegetables, U.S. Grade Standards
www.usda.gov
Fruits, Grading, Certification and Verification of Frozen Fruits, U.S. Grade Standards
Washington State Department of Agriculture
agr.wa.gov
American Frozen Foods Institute
www.affi.com
Organic Trade Association
www.ota.com