Hollingsworth, C., Berry, 1., Fisher, G., State University. Extension Service, O., State University. Cooperative Extension, W., of Idaho. Cooperative Extension Service, U., States. Department of Agriculture, U., & Northwest Cooperative Extension, P. (1984). A sampling plan for two-spotted spider mites in mint. : [Corvallis, Or.] : Oregon State University Extension Service, Washington State University Cooperative Extension, University of Idaho Cooperative Extension Service, and U.S. Dept. of Agriculture.