MLA

State University. Agricultural Experiment Station, Oregon, United States. Agency for International Development, and International Maize and Wheat Improvement Center. Results of the 20th International Early Maturing Winter X Spring Wheat Screening Nursery (1997-1998). : Corvallis, Or. : Agricultural Experiment Station, Oregon State University ; [s.l.] : The Agency for International Development, U.S. Dept. of State ; [s.l.] : The International Maize and Wheat Improvement Center, 1999.