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Publisher
- Agricultural Economics Bureau4
- Fixed Nitrogen Research Laboratory4
- Porto Rico Agricultural Experiment Station4
- Agricultural Marketing Administration3
- Agricultural Engineering Bureau2
- Public Roads Bureau2
- Puerto Rico Agricultural Experiment Station2
- Punt Industry, Soils, and Agricultural Engineering Bureau2
- Agricultural Marketing Service1
- Entomolgy Bureau1
- Entomotogy and Plant Quarantine Bureau1
- Experiment Stations Office1
- Federal Horticultural Board1