1. Wijsman, J.H., Proc. Int. Rapeseed Conf., Ste. Adele, Quebec, Rapeseed Assoc. of Canada, Ottawa, 1970, p. 6.
2. Porteous, W.L., and R.B. Johnson, Ibid., p. 12.
3. Lang, O., Ibid., p. 150.
4. Aref, M.M., Ibid., p. 525.
5. Bhatty, R.S., and F.W. Sosulski, JAOCS 49:346 (1972).