The Recreation Opportunity Spectrum: A Framework for Planning, Management, and Research. Roger N. Clark and George H. Stankey. Pacific Northwest Forest and Range Experiment Station, U.S. Department of Agriculture, Forest Service, 809 N.E. Sixth Avenue, Portland, Oregon 97232. December 1979. 32p
1980 ◽
Vol 19
(2)
◽
pp. 26-26
◽