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其他書名
Inventory of Natural Areas and Sites Recommended as Potential Natural Landmarks
出版U.S. Department of the Interior, National Park Service, 1976
URLhttp://books.google.com.hk/books?id=PI4qQzayxLAC&hl=&source=gbs_api
註釋Prepared under contract 14-10-9-990-186, Article II as revised 5 April 1970 with the U.S. Dept. of the Interior, National park Service.