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3. Carter, T. A., 1971. Bacterial contamination of hatching eggs and chicks produced by broiler breeders housed in litter-slat and sloping floor management Systems, Ph.D. Thesis, Pennsylvania State University.
4. Wire and litter management systems for broiler breeders.;Carter;Poultry Sci.,1972
5. R/B enteric differential system.;Diagnostic Research,1968