مؤلف غير معروف([Corvallis, Or. : Agricultural Experiment Station, Oregon State University ; [Washington, D.C.] : Agricultural Research Service, USDA, 2013-10-16)
مؤلف غير معروف(Corvallis, Or. : Agricultural Experiment Station, Oregon State University, in cooperation with Agricultural Research--SEA, USDA, 2013-10-16)