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- [2] PASTURE SEED CERTIFICATION - CONDITIONS GOVERNING SEED PRODUCTION TASMANIAN JOURNAL OF AGRICULTURE, 1966, 37 (02): : 120 - &
- [3] PRODUCTION AND CERTIFICATION OF SEED POTATOES IN SWITZERLAND AMERICAN POTATO JOURNAL, 1970, 47 (09): : 362 - &
- [4] The Seed Quality Assurance Regulations and Certification System in Soybean Production-A Chinese and International Perspective AGRICULTURE-BASEL, 2022, 12 (05):
- [5] SEED CERTIFICATION NORTH DAKOTA COOPERATIVE EXTENSION SERVICE CIRCULAR, 1985, (A-602): : 21 - 21
- [7] SEED CERTIFICATION NORTH DAKOTA COOPERATIVE EXTENSION SERVICE CIRCULAR, 1981, (NA-60): : 21 - 22
- [9] SEED POTATO PRODUCTION FOR SMALL FARMERS IN MEXICO AMERICAN POTATO JOURNAL, 1985, 62 (08): : 447 - 447