Libro 180,267 Procedimiento de la Conferencia 22,111 Documento de Gobierno 19,571 Electrónico 8,940 Tesis 4,758 Revista 4,139 Seriadas 3,990 Desconocido 1,010 Conjunto 160 Capítulo de libro 97 Manuscrito 74 Audiom 62 Material de referencia 62 Mapa 53 Fotografía 37 Artículo 5 Objeto Físico 4 Partituras 1 Periódico 1 ver todos ...

Q - Ciencia 190,471

United States National Bureau of Standards 7,802 SpringerLink (Online service) 3,758 National Institute of Standards and Technology (U.S.) 2,852 ebrary, Inc 2,160 Society of Photo-optical Instrumentation Engineers 2,134 ProQuest (Firm) 1,537 Massachusetts Institute of Technology Center for Theoretical Physics 1,330 United States Weather Bureau 1,009 World Scientific (Firm) 891 American Institute of Physics 889 World Meteorological Organization 769 Society of Photo-Optical Instrumentation Engineers 734 SPIE (Society) 726 United States Bureau of Standards 675 Massachusetts Institute of Technology Joint Program on the Science & Policy of Global Change 645 De Gruyter 634 North Atlantic Treaty Organization Scientific Affairs Division 626 Environmental Research Laboratories (U.S.) 618 Massachusetts Institute of Technology Plasma Fusion Center 583 National Climatic Data Center (U.S.) 551 Edgar Fahs Smith Memorial Collection (University of Pennsylvania) 517 United States National Oceanic and Atmospheric Administration 512 Massachusetts Institute of Technology Research Laboratory of Electronics 483 United States National Aeronautics and Space Administration 476 International Union of Pure and Applied Physics 449 National Climatic Center 448 Einstein, Albert, 1879-1955 438 Massachusetts Institute of Technology Plasma Science and Fusion Center 413 International Atomic Energy Agency 400 United States Environmental Data Service 400 ver todos ...

English 160,142 German 12,352 French 9,350 Russian 7,105 Italian 2,127 Spanish 1,775 Chinese 1,774 Latin 1,220 Japanese 1,056 Dutch 647 Polish 323 Portuguese 315 Arabic 308 Undetermined 307 Indonesian 259 Danish 206 Swedish 205 Multiple 190 Hebrew 170 Czech 164 Korean 152 Romanian 141 Ukrainian 107 Hungarian 104 Norwegian 99 Ancient Greek 96 Vietnamese 91 Greek 66 Thai 66 Turkish 61 ver todos ...

Congresses 26,623 Conference papers and proceedings 18,945 Electronic books 16,773 Technical reports 12,393 Periodicals 5,982 History 4,227 Biography 3,739 Early works to 1800 2,498 Biographies 2,465 Observations 2,065 Tables 1,856 Early works 1,745 Dictionaries 1,399 Textbooks 1,236 Handbooks, manuals, etc 1,143 Academic theses 1,066 Bibliography 1,001 Handbooks and manuals 954 Early works to 1850 948 Popular works 937 Problems, exercises, etc 905 Statistics 883 Electronic journals 759 Thèses et écrits académiques 721 Juvenile literature 699 Tables (Data) 675 Problems and exercises 646 Festschriften 641 Charts, diagrams, etc 621 Congrès 581 ver todos ...

1879-1955 1,330 20th century 827 Early works to 1800 808 1642-1727 509 Early works to 1850 492 1900-1999 420 19th century 306 1791-1867 180 18th century 175 1885-1962 174 17th century 164 1904-1967 144 1901-1976 106 1831-1879 104 1900 - 1999 96 21st century 96 1800-1899 92 1745-1827 87 1858-1947 82 1922- 82 1901-1954 75 Holocene 74 Quaternary 71 1564-1642 68 1871-1937 68 1887-1961 67 1942-2018 66 1918-1988 65 1957-1958 65 Geschichte 65 ver todos ...

United States 5,719 Germany 988 China 965 Great Britain 832 Soviet Union 670 India 590 Japan 529 Europe 472 France 459 Italy 456 Canada 368 England 334 Australia 298 Russia (Federation) 289 Arctic regions 281 Tropics 281 Antarctica 266 California 263 Indonesia 248 Africa 228 Austria 214 Mexico 194 Asia 189 Alaska 187 Norway 186 Pacific Ocean 182 Arctic Regions 166 Earth (Planet) 164 Developing countries 160 New York (State) 156 ver todos ...