prepared with the assistance of IUCN, Jeffrey A. McNeely, James W. Thorsell, Héctor Ceballos-Lascuráin
World Tourism Organization , United Nations Environment Programme, Terrestrial Ecosystems Branch, Industry and Environment Programmme Activity Centre
1992
1st ed
Tourism and the environment / WTO, UNEP-IE/PAC
. Technical report series ; no. 13
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