Chicago

Johansen, C. A. (Carl A.), D. M Burgett, Oregon State University. Extension Service, Washington State University. Cooperative Extension, University of Idaho. Cooperative Extension Service, and United States. Department of Agriculture. 1981. Honey Bee Diseases and Their Control. : [Covallis, Or.] : Washington State University Cooperative Extension, Oregon State University Extension Service, University of Idaho Cooperative Extension Service, and U.S. Dept. of Agriculture.