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1981-82 sunflower objective yield research
- Craig, Michael E. and United States Department of Agriculture. Statistical Reporting Service. Statistical Research Division.
- SRS staff report ; no. AGES 840426 1984
- Sunflowers -- Yields -- North Dakota, Helianthus annuus, crop yield, on-farm research, and North Dakota
- U.S. Dept. of Agriculture, Statistical Reporting Service, Statistical Research Division
- USDA publications