1. Analytical methods for atomic absorption spectrophotometry;Anonymous,1964
2. Association of Official Agricultural Chemists, 1960. Official Methods of Analysis. 9th Ed., Washington, D.C
3. Multiple range and multiple F tests;Duncan;Biometrics,,1955
4. The amount of manganese required to prevent perosis in the chick;Gallup;Poultry Sci.,1939
5. Utilization of manganese from different compounds and its distribution in the body of the chicken;Hennig;Biol. Abs.,1967