Unknown author(Corvallis, [Or.] : Agricultural Experiment Station, Oregon State University ; [s.l.] : The Agency for International Development, U.S. Dept. of State ; [s.l.] : International Maize and Wheat Improvement Center, 2013-10-16)
Unknown author(Portland, Oregon : Environmental and Water Resources Engineering, Department of Civil Engineering, Portland State University, 2013-10-16)