APA
ELLIOTT H. (., . (1974). Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972. SWITZERLAND: IUCN.
Chicago
ELLIOTT HUGH (ED.), . 1974. Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972. SWITZERLAND: IUCN.
Harvard
ELLIOTT H. (., . (1974). Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972. SWITZERLAND: IUCN.
MLA
ELLIOTT HUGH (ED.), . Second world conference on national parks Yellowstone and Grand Teton National Parks, USA, Sept. 18-27, 1972. SWITZERLAND: IUCN. 1974.
TextPublication details: SWITZERLAND 1974 IUCNUniform titles: 
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