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Virgil W. Hays

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Agricultural Uses of Antibiotics
Effectiveness of Feed Additive Usage of Antibacterial Agents in Swine and Poultry Production
Antibiotics for Animals Item#Cc1989-2
Effectiveness of Feed Additive Usage of Antibacterial Agents in Swine and Poultry Production
Effectiveness of Feed Additive Usage of Antibacterial Agents in Swine and Poultry Production