1. Wheat Program; International Maize and Wheat Improvement Center (CIMMYT); Apdo. Postal 6-641 06600 Mexico, D. F. Mexico
2. 49 Lionel Rd. Darlington WA 6070 Australia
3. Dep. of Plant Breeding and Biometry, 252 Emerson Hall; Cornell Univ.; Ithaca NY 14853