1. Statistical theory in research;Anderson,1952
2. Milk analysis with the infrared milk analyzer;Biggs;J. Dairy Sci.,1967
3. Boswell, R. C, E. Green, and D. I. Jenkins. 1967. Daily variation in the compositional quality of exfarm milk. Brit. Milk Marketing Board. Tech. Div. Report #58.
4. Relative accuracy of systematic and stratified random samples for a certain class of populations;Cochran;Annu. Math. Stat.,1946
5. Dimick, P. S., and H. V. Atherton. 1962. Factors influencing butterfat sampling accuracy in bulk cooled milk. Vermont Agr. Exp. Sta. Bull. #626.