Conditions for the transformation of eco-tourism into sustainable tourism Author Welford R., Ytterhus B. Journal/Series European Environment | Vol. 8(6); 193 - 201; 9 p. Date 1998 Source IUCN (ID: ANA-063987) Publisher | Place of publication European Research Press, Ltd. | Shipley, UK Document type Article in periodical Language English Field of application International Subject Environment gen. Keyword Tourism