Report on the Progress and Condition of the Illinois State Museum of Natural HistoryIllinois State Museum of Natural History, 1912 - Natural history |
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19th Annual Report 21st Annual Report Alaska Athyris Burlington California Carboniferous Catalogue Charles Chester Group Cincinnati Group Clays Coal Field Coal Measures Colorado Corniferous Group Creek Cretaceous DeKoninck Deposits Dept Devonian District Ethnology Forest Reserve Fossil Geological Survey Geologist Grundy county Hall Hamilton Group Henry Henry Gannett Hist Illinois Indiana Irrigation Paper Jersey Kentucky Keokuk Keokuk Group Keokuk Limestone Kinderhook Kinderhook Group Lesquereux Louis Limestone Lower Carboniferous Lower Coal Measures Mazon Creek Mineral Mining Monroe county N. J. Geol Nattheim Natural History Niagara Group North American Ohio Paleontology Paleozoic Pleurotomaria Preliminary Report Report of Progress River Rocks shale Silurian Smith Spirifer Trenton Group Type U. S. G. S. Bulletin U. S. G. S. Monographs U. S. G. S. Prof U. S. G. S. Water-supply Paper U. S. Geol U. S. National Museum Ulrich Upper Silurian Water-supply and Irrigation Worthen