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Call Number Author Topic Genre Region Era

By Alphabetical By Topic By Genre By Era

20th century 6,522 View Records 19th century 3,213 View Records 21st century 1,750 View Records 18th century 1,104 View Records Civil War, 1861-1865 985 View Records 1945- 795 View Records Cretaceous 792 View Records 1945-1989 650 View Records 17th century 643 View Records 1933-1945 539 View Records Revolution, 1775-1783 516 View Records 1989- 435 View Records 16th century 432 View Records Tertiary 430 View Records 2009- 410 View Records 1946- 401 View Records 2001-2009 389 View Records Quaternary 363 View Records 1991- 350 View Records Colonial period, ca. 1600-1775 347 View Records To 1500 325 View Records Paleozoic 309 View Records Precambrian 304 View Records Cenozoic 279 View Records 2000- 261 View Records Permian 237 View Records 1960- 223 View Records 1993-2001 223 View Records Eocene 223 View Records 1918-1945 219 View Records 1981-2001 218 View Records 1564-1616 214 View Records Jurassic 206 View Records Miocene 199 View Records Pennsylvanian 199 View Records Mesozoic 196 View Records 1951- 191 View Records 1929 186 View Records Ordovician 179 View Records Pleistocene 172 View Records 1945-1953 167 View Records Mississippian 163 View Records Devonian 160 View Records 1979- 159 View Records 1949- 157 View Records 1980- 156 View Records 1809-1865 152 View Records 1783-1865 148 View Records 1953-1961 148 View Records Triassic 140 View Records 1990- 137 View Records 1981-1989 136 View Records Civil War, 2011- 136 View Records 1882-1945 134 View Records 2001- 133 View Records Early modern, 1500-1700 133 View Records 1993- 127 View Records To 1775 124 View Records 1947- 123 View Records 1775-1865 117 View Records 2003- 117 View Records 1997- 116 View Records 1775-1783 115 View Records 1960-1980 112 View Records Revolution, 1789-1799 110 View Records Cambrian 109 View Records Pliocene 108 View Records 1969-1974 104 View Records Holocene 103 View Records World War, 1939-1945 102 View Records 1980-2020 101 View Records 1969- 100 View Records 1913-1994 98 View Records 1970- 98 View Records Oligocene 98 View Records To 146 B.C. 98 View Records To 1846 97 View Records Proterozoic 96 View Records 1917-1963 95 View Records 1952- 94 View Records 1976-2002 94 View Records 1975- 93 View Records 1981-1993 92 View Records 1865-1918 91 View Records 1988- 91 View Records 2016 91 View Records Carboniferous 91 View Records To 1848 90 View Records War of 1812 90 View Records 1949-1976 89 View Records 1963-1969 87 View Records 1948- 86 View Records 1959-1990 86 View Records 1965- 85 View Records Silurian 85 View Records 1815-1861 84 View Records 2002- 83 View Records 1858-1919 82 View Records 1889-1945 82 View Records 1986- 80 View Records

Colorado 92 Wyoming 91 Montana 69 Utah 47 Alaska 46 Texas 45 Powder River Basin (Wyo. and Mont.) 43 United States 35 New Mexico 34 California 31 West (U.S.) 26 San Juan Basin (N.M. and Colo.) 21 North America 18 Kansas 16 New Jersey 16 South Carolina 16 Uinta Basin (Utah and Colo.) 16 South Dakota 14 Georgia 13 Mesaverde Group 13 Puerto Rico 13 Piceance Creek Basin 12 Southern States 12 Wind River Basin 11 Black Hills (S.D. and Wyo.) 10 Frontier Formation 10 North Dakota 10 Bighorn Basin (Mont. and Wyo.) 9 Gulf Coast (U.S.) 9 Mississippi 9 New York (State) 9 Pierre Shale 9 Alabama 8 Arizona 8 Carbon County 8 Oregon 8 Great Plains 7 North Carolina 7 Wind River Basin (Wyo.) 7 Grand County 6 Green River Watershed (Wyo.-Utah) 6 Lakota Formation 6 Tennessee 6 Beaverhead County 5 Dakota Formation 5 Garfield County 5 Gulf States 5 Idaho 5 Judith River Formation 5 Mancos Shale 5 Maryland 5 Mexico 5 Mississippi Embayment 5 Ocean Point 5 America 4 Arkansas 4 Atlantic Coast (U.S.) 4 Colorado Plateau 4 Delaware 4 Emery County 4 Fremont County 4 Front Range (Colo. and Wyo.) 4 Lance Formation (Colo. and Wyo.) 4 Middle Atlantic States 4 National Petroleum Reserve 4 Natrona County 4 Nebraska 4 Nevada 4 North Slope 4 Pacific Coast 4 Pacific Coast (U.S.) 4 Park County 4 Pennsylvania 4 Piceance Creek Watershed 4 Prince Creek Formation (Alaska) 4 Steele Shale 4 Steele Shale (Wyo.) 4 Washington (State) 4 Weston County 4 Alberta 3 Blackleaf Formation (Mont.) 3 Book Cliffs (Utah and Colo.) 3 Caribbean Area 3 Charleston County 3 Fox Hills Formation 3 Jefferson County 3 Johnson County 3 Lincoln County 3 Madison County 3 Madison Range 3 Massachusetts 3 Mexico, Gulf of 3 Niobrara County 3 Ocean Point Region 3 Piceance Creek Basin (Colo.) 3 Powder River Watershed (Wyo. and Mont.) 3 Raton Basin (Colo. and N.M.) 3 San Juan County 3 South America 3 Suffolk County 3