Management guidelines for monitoring use on backcountry trails
Northeastern Forest Experiment Station (Radnor, Pa.)
Godin, Victor, and R. E. Leonard. 1977. Permit compliance in eastern wilderness: Preliminary results. USDA For. Serv. Res. Note NE-238, 3 p. Guldin, Richard W. 1978. An economic model of the costs of wilderness recreation incurred by the ...