Code-a-site a system for inventory of dispersed recreational sites in roaded areas, back country, and wilderness - Pacific Northwest Forest and Range Experiment Station (Portland, Or.); Hendee, John C.; Clark, Roger N.; Hogans, Mack L.; Wood, Dan.; Koch, Russell W.; United States. Forest Service (Portland, Or. U.S. Dept. of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station, 1976)
Cover title.
Bibliography: p. 32-33.
Keywords: Recreation areas -- United States; Wilderness areas -- United States; Natural resources -- United States