Tác giả
United States. Department of Agriculture
North Carolina. Crop Reporting Service
3
North Carolina. Dept. of Agriculture
3
United States. Agricultural Marketing Service
3
Hawaii Agricultural Experiment Station
2
University of Hawaii (Honolulu). Agricultural Extension Service
2
North Carolina. Crop & Livestock Reporting Service
1
North Carolina. Division of Agricultural Statistics
1
United States. Bureau of Agricultural Economics
1