State University. Cooperative Extension Service, O., Northwest Cooperative Extension, P., Strawn, B., Sinnard, H., & Sinnard, 1. (1967). Homes for senior citizens : a check list. : [Corvallis, Or.] : Oregon State University, Cooperative Extension Service ; [Olympia, Wash.] : Washington State University Extension Service ; [Moscow, Idaho] ; University of Idaho Agricultural Extension Service ; [Washington, D.C.] ; U.S. Dept. of Agriculture.