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Visitor Impact Management: The planning framework

Fred R. KussAlan R. GraefeJerry J. Vaske

出版	National Parks and Conservation Association, 1990
主題	Travel / Parks & Campgrounds
ISBN	09400913219780940091320
URL	http://books.google.com.hk/books?id=NhgbSgAACAAJ&hl=&source=gbs_api