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Geology of the De Queen and Caddo Gap Quadrangles, Arkansas, by Hugh D. Miser and A.H. Purdue. [U.S. Geological Survey Bulletin 808.].

United States. Congress. House

出版	1928
URL	http://books.google.com.hk/books?id=W2XFwQEACAAJ&hl=&source=gbs_api