1. Survey of Water Insoluble Acids in Commercial Butter.;Armstrong;Butter Cheese and Milk Prod. J.,1951
2. Personal communication;Bell,1951
3. The Determination of Hydrogen Ions;Clark,1928
4. Determination of Water Insoluble Fatty Acids in Cream and Butter;Hillig;J. Assoc. Offic. Agr. Chem.,1947
5. Personal communication;Roberts,1945