TY  - BOOK
AU  - Cole,David N.
TI  - Wilderness campsite monitoring methods: a sourcebook 
T2  - USDA Forest Service general technical report
U1  - 796.54 23
PY  - 1989///
CY  - Ogden, Utah
PB  - United States. Department of Agriculture, Forest Service, Intermountain Research Station, 
N1  - Incluye bibliografías
ER  -