1. U.S. Department of Agriculture, Economic Research Service, Oil Crops Situation and Outlook Reports and Fats and Oils Situation and Outlook Reports.
2. Anonymous, Time, Oct. 21, 1935, p. 34.
3. Naemura, T., British Patent 1,466,241 (1923).
4. Spon's Encyclopedia of the Industrial Arts, Manufacturers, and Commercial Products;Spon,1980