T - Technology 50,875

United States Bureau of Mines 5,774 Geological Survey (U.S.) 694 United States National Aeronautics and Space Administration 310 ebrary, Inc 282 United States Minerals Management Service. Gulf of Mexico OCS Region 207 Edgar Fahs Smith Memorial Collection (University of Pennsylvania) 204 American Association of Petroleum Geologists 193 Canada Mines Branch 170 ProQuest (Firm) 151 American Society for Metals 131 Illinois State Geological Survey 131 Langley Research Center 129 United States General Accounting Office 127 Safety in Mines Research Establishment (Great Britain) 119 Fieldner, Arno Carl, 1881-1966 108 Lewis Research Center 100 Geological Society of London 94 Minerals, Metals and Materials Society Annual Meeting 90 Institution of Mining and Metallurgy (Great Britain) 84 University of Alabama 79 Canada Mines Branch (1901-1936) 76 Society of Exploration Geophysicists 76 United States Congress. Senate. Committee on Interior and Insular Affairs 76 United States Bureau of Land Management 74 University of Wyoming 74 United States Mine Safety and Health Administration 72 American Society for Testing and Materials 69 Thimons, Edward D 69 American Institute of Mining, Metallurgical, and Petroleum Engineers 68 International Atomic Energy Agency 67 see all ...

English 40,858 Russian 2,959 German 2,464 French 1,903 Spanish 1,271 Chinese 843 Portuguese 361 Italian 278 Japanese 245 Polish 171 Indonesian 137 Latin 104 Arabic 99 Czech 94 Turkish 84 Swedish 81 Dutch 61 Korean 59 Undetermined 49 Ukrainian 46 Vietnamese 45 Norwegian 44 Hungarian 39 Greek 36 Croatian 33 Romanian 32 Slovak 23 Multiple 22 Persian 22 Danish 16 see all ...

Congresses 3,636 Conference papers and proceedings 2,661 History 2,020 Electronic books 1,532 Dictionaries 489 Handbooks, manuals, etc 425 Biography 399 Early works to 1800 347 Bibliography 333 Statistics 314 Handbooks and manuals 305 Biographies 239 Academic theses 194 Early works 190 Pictorial works 180 Guidebooks 165 Maps 157 Bibliographies 135 Technical reports 133 Directories 122 Thèses et écrits académiques 118 Catalogs 91 Tables 90 Congrès 89 Government publications 89 CD-ROMs 75 Exhibitions 73 Congrès 70 dissertations 69 Printed ephemera 68 see all ...

20th century 224 19th century 185 Early works to 1800 105 1900-1999 90 18th century 75 To 1500 64 Cretaceous 55 1800-1899 51 1494-1555 45 Carboniferous 42 Precambrian 39 Tertiary 35 16th century 32 21st century 31 Paleozoic 30 Cenozoic 28 Pennsylvanian 28 17th century 26 Devonian 26 Permian 25 1800-1999 24 Jurassic 22 1700-1799 21 Mesozoic 21 From 280 to 345 million years ago 19 From 570 million to 5 billion years ago 18 Geschichte 18 1700-1899 16 1900 - 1999 16 19e siècle 16 see all ...

United States 2,836 China 787 California 703 Pennsylvania 623 Russia (Federation) 598 Germany 573 Soviet Union 527 Australia 509 Canada 450 Alaska 444 India 432 New Mexico 396 France 388 Great Britain 375 Colorado 373 Mexico 341 England 325 Idaho 321 Brazil 318 Texas 315 Nevada 291 Arizona 288 South Africa 262 Illinois 255 Europe 250 Utah 236 Wyoming 224 Montana 219 Mexico, Gulf of 218 West Virginia 210 see all ...