State University. Agricultural Experiment Station, O., States. Agency for International Development, U., & Maize and Wheat Improvement Center, I. (1985). Results of the Eleventh International Winter X Spring Wheat Screening Nursery (1983-1984). : [Corvallis, Or.] : Agricultural Experiment Station, Oregon State University, The Agency for International Development, U.S. Dept. of State, The International Maize and Wheat Improvement Center.