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Annual Report of the State Geologist and the Mineral Industries of Arkansas in 1942

Geological Survey of ArkansasGeorge Casper BrannerGeorge Rose SmithNoel H. StearnPaul George HeroldWilliam Heyden EastonGeorge Richard Heyl

出版	State of Arkansas, Arkansas Geological Survey, 1930
URL	http://books.google.com.hk/books?id=l_VZzgEACAAJ&hl=&source=gbs_api