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Mineral Production in Illinois in 1965 and Summary of Illinois Mineral Production by Commodities, 1941-1965

David A. StephensonDonald Lee GrafGeorge Muggah HughesGrover Harry EmrichJack Sargent HoskingJerry Alvin LinebackRalph Eugene HunterRichard David HarveyRobert F. SeversonWillis L. BuschColin Ross BlythPaul KraatzWilliam Arthur WhiteR. S. StemmlerRonald Arthur LandonWalter Edward Parham

出版	Illinois State Geological Survey, 1966
URL	http://books.google.com.hk/books?id=9wZSAQAAMAAJ&hl=&source=gbs_api