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Illinois Mineral Industry in 1979/1980 and Review of Preliminary Mineral Production Data for 1981

Colin G. TreworgyIrma SamsonJames C. CobbJohn M. MastersJonathan H. GoodwinMark CloosR. J. JacobsonSubhash Bhagwat

出版	Illinois State Geological Survey, 1980
URL	http://books.google.com.hk/books?id=8ku_FzipxE4C&hl=&source=gbs_api