1. The Feed Bulletin, The Jacobsen Publishing Co., Chicago, Ill., May 5, 1972, p.1.
2. Soybean Digest. 32:7 (1971).
3. Ibid. Soybean Digest. 33:26 (1972).
4. Agribusiness Report, Vol. 5, No. 10, March 6, 1972.
5. Krober, O.A. and F.I. Collins, JAOCS 25:296 (1948).