State University. Cooperative Extension Service, O., State University. Cooperative Extension Service, W., of Idaho. Cooperative Extension Service, U., Northwest Woodland Publications Committee, P., Northwest Cooperative Extension, P., & Newton, 1. (1970). Planting forest trees in the Pacific Northwest. : [Corvallis, Or.] : Oregon State University Cooperative Extension Service ; [Pullman, Wash.] : Washington State University Cooperative Extension Service ; [Moscow, Idaho] : University of Idaho Cooperative Extension Service.