1. Effects of various protein levels and penicillin on growth and intestinal flora of chickens;Anderson;J. Nutr.,1952
2. Antibiotics and the growth of ducks;Branion;Poultry Sci.,1953
3. Livestock and Livestock Products;Byerly,1964
4. Effect of chlortetracycline on the absorption of amino acids in the intestines of chicks;Lotenkov;Khim. Sel. Khoz,1967
5. Principles and Procedures of Statistics;Steele,1960