1. Official and Tentative Methods of the American Oil Chemists’ Society, Vol. I & II, Third edition, AOCS, Champaign, IL, 1973 (with additions and revisions available yearly), Method Cd 1–25.
2. Indian Standard Methods of Sampling and Test for Ghee (Butter Fat), Indian Standards Institution, Manak Bhavan, New Delhi-1, India, May 1967, IS:3508.
3. Hofmann, H.D., and C.E. Green, Oil & Soap 16:236 (1939).
4. Cocks, L.V., and C. Van Rede, “Laboratory Handbook for Oil and Fat Analysts,” Academic Press, London and New York, 1966, pp. 406–407.
5. Hilditch, T.P., “The Chemical Constitution of Natural Fats,” Chapman & Hall Ltd., London, England, 1940, p. 125.