TY  - BOOK
AU  - ELLIOTT, HUGH (ED.)
TI  - Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972
U1  - 363.5 
PY  - 1974///
CY  - SWITZERLAND
PB  - IUCN
KW  - Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972
ER  -