1. Association of Official Agricultural Chemists, 1960. Official Methods of Analysis. Ninth Edition. Washington, D.C.
2. Multiple range and multiple F tests.;Duncan;Biometrics,1955
3. Two new double-yielding tapiocas.;Seemanthani;Indian Farm,,1962
4. Statistical Methods;Snedecor,1956
5. Effect of yuca meal in baby chick rations.;Squibb;Turrialba,,1951