Milk production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
Παραπομπή σε μορφή Chicago (17η εκδ.)Milk Production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
Παραπομπή σε μορφή MLA (9th εκδ.)Milk Production / Crop Reporting Board, Economics, Statistics, & Cooperatives Service, U.S. Department of Agriculture.
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