1. The Design of Experiments;Fisher,1935
2. Correction of Milk Yield for Fat Content III;Gaines;Agr. Exp. Sta. Bul.,1923
3. Statistical Methods;Snedecor,1940
4. The Analysis of Replicated Experiments when the Field Results are In-complete;Yates;Empire Jour. Expt. Agr.,1933