LITERATURE CITED 



Cochran, William G. 



1963. Sampling techniques. (Second edition) New York: John Wiley 5 Sons. 

 413 p. , illus . 



Cushwa, Charles T. , Burd S. McGinnes, and Thomas H. Ripley 



1965. Forest recreation estimates and predictions in the North River area, George 

 Washington National Forest, Virginia. Va. Polytech. Inst. Agr. Exp. Sta. 

 Bull. 558. Blacksburg, Va. 48 p., illus. 



Hendee, John C. , William R. Catton, Jr., Larry D. Marlow, and C. Frank Brockman 



1968. Wilderness users in the Pacific Northwest - their characteristics, values, 

 and management preferences. USDA Forest Serv. Res. Pap. PNW-61. 

 92 .p. , illus . 



James, George A., and Robert K. Henley 



1968. Sampling procedures for estimating mass and dispersed recreation use on 

 large areas. USDA Forest Serv. Res. Pap. SE-31. 15 p., illus. 



Lucas, Robert C. 



1964. Recreational use of the Quetico-Superior area. USDA Forest Serv. Res. Pap. 

 LS-8. 50 p. , illus. 



Thorsell, J. W. 



1967. Wilderness recreational use: Waterton Lakes National Park. Recreational Res. 

 Pap. 24. Nat. Park Serv., Dep. Indian Aff. and Northern Develop., Ottawa. 

 57 p. , illus . 



1968. Trail use survey: Banff and Yoho National Parks. Recreational Res. Rep. 

 33. Nat. Park Serv., Dep. Indian Aff. and Northern Develop., Ottawa. 

 57 p. , illus . 



University of California Wildland Research Center 



1962. Wilderness and recreation--a report on resources, values, and problems, 



ORRRC Study Rep. 3. Outdoor Recreation Resources Rev. Comm., Wash., D.C. 

 352 p . , illus . 



USDA Forest Service 



1959. National Forest Recreation Survey (NFRS) . (Unpublished.) Wash., D.C. 

 123 p. , illus . 



Wenger, Wiley D. , Jr. 



1964. A test of unmanned registration stations on wilderness trails: factors 

 influencing effectiveness. USDA Forest Serv. Res. Pap. PNW-16. 

 48 p. , illus. 



, and H. M. Gregersen 



1964. The effect of non-response on representativeness of wilderness-trail 



register information. USDA Forest Serv. Res. Pap. PNW-17. 20 p., illus. 



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