Home›Books›Chickens in NPIP hatchery supply flocks and their distribution by states and varieties 1941-42 to 1946-47Chickens in NPIP hatchery supply flocks and their distribution by states and varieties 1941-42 to 1946-47by United States. Bureau of Animal IndustryNo description available.BreedingStatisticsChickensNational Poultry Improvement Plan (U.S.)