United States Department of Agriculture
www.ams.usda.gov/grades-standards/vegetables
Vegetables, Grading, Certification and Verification of Frozen Vegetables, U.S. Grade Standards
www.ams.usda.gov/grades-standards/fruits
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.org
Organic Trade Association
www.ota.com