01952oam 2200577I 450 991070400580332120151229130856.0(CKB)5470000002437601(OCoLC)885009393(EXLCZ)99547000000243760120140731d1956 ua 0engurn||||||||||txtrdacontentcrdamediacrrdacarrierOrdovician and Silurian coral faunas of western United States /Helen Duncan[Washington, D.C.] :[U.S. Department of the Interior, U.S. Geological Survey],[1956][Washington, D.C.] :[Government Printing Office]1 online resource (iii, 209-236 pages, plates) illustrations, mapGeological Survey bulletin ;1021-FA contribution to general geologyTitle from title screen (viewed July 21, 2014).Includes bibliographical references (pages 231-234) and index.Corals, FossilWest (U.S.)PaleontologyWest (U.S.)SilurianPaleontologyWest (U.S.)OrdovicianCorals, FossilfastOrdovician Geologic PeriodfastPaleontologyfastSilurian Geologic PeriodfastUnited States, WestfastCorals, FossilPaleontologyPaleontologyCorals, Fossil.Ordovician Geologic Period.Paleontology.Silurian Geologic Period.Duncan Helen1396296Geological Survey (U.S.),COPCOPOCLCOGPOOCLCFGPOBOOK9910704005803321Ordovician and Silurian coral faunas of western United States3456128UNINA