Book 72,184 Government Document 12,942 Conference Proceeding 5,962 Serial 2,004 Electronic 1,813 Journal 1,734 Thesis 482 Unknown 433 Reference Material 53 Audio 39 Kit 39 Photo 28 Manuscript 24 Book Chapter 13 Map 1 Musical Score 1 Newspaper 1 see all ...

T - Technology 76,893

United States National Aeronautics and Space Administration 4,976 Langley Research Center 3,812 Lewis Research Center 2,400 Society of Automotive Engineers 1,121 United States National Aeronautics and Space Administration. Scientific and Technical Information Branch 1,115 United States Federal Aviation Administration 764 Goddard Space Flight Center 762 Ames Research Center 737 John Winston Graham Aeronautical Collection (Beinecke Rare Book and Manuscript Library) 717 American Institute of Aeronautics and Astronautics 705 United States National Aeronautics and Space Administration Scientific and Technical Information Branch 702 United States National Aeronautics and Space Administration. Scientific and Technical Information Office 685 George C. Marshall Space Flight Center 632 United States General Accounting Office 605 ebrary, Inc 563 SpringerLink (Online service) 551 American Astronautical Society 479 Society of Photo-optical Instrumentation Engineers 403 United States Civil Aeronautics Administration 403 United States National Aeronautics and Space Administration. Scientific and Technical Information Division 355 United States National Transportation Safety Board 331 SAE International Congress & Exposition 329 Institute of Electrical and Electronics Engineers 276 International Civil Aviation Organization 265 North Atlantic Treaty Organization Advisory Group for Aeronautical Research and Development 255 United States National Highway Traffic Safety Administration 253 Massachusetts Institute of Technology Flight Transportation Laboratory 247 North Atlantic Treaty Organization Advisory Group for Aerospace Research and Development. Fluid Dynamics Panel 225 Jet Propulsion Laboratory (U.S.) 219 North Atlantic Treaty Organization Advisory Group for Aerospace Research and Development. Structures and Materials Panel 219 see all ...

English 65,586 French 3,630 Russian 3,407 German 2,914 Italian 1,111 Chinese 755 Spanish 665 Japanese 350 Portuguese 255 Polish 212 Dutch 152 Czech 87 Indonesian 80 Hebrew 68 Swedish 64 Arabic 57 Korean 50 Romanian 49 Danish 41 Undetermined 39 Ukrainian 38 Multiple 37 Turkish 31 Malay 22 Finnish 19 Icelandic 18 Bulgarian 17 Lithuanian 17 Norwegian 16 Greek 15 see all ...

Congresses 7,468 Conference papers and proceedings 6,206 History 5,025 Biography 3,323 Electronic books 3,147 Periodicals 2,592 Technical reports 2,253 Biographies 1,915 Pictorial works 1,014 Handbooks, manuals, etc 807 Dictionaries 655 Juvenile literature 571 Handbooks and manuals 507 Statistics 476 Catalogs 468 Bibliography 286 Autobiographies 270 Directories 268 Juvenile works 252 Popular works 235 Exhibitions 224 Early works to 1900 204 Illustrated works 204 Tables 198 Government publications 181 Observations 172 Electronic journals 155 Exhibition catalogs 155 Early works to 1800 136 Video recordings 127 see all ...

20th century 947 1900-1999 438 1867-1912 173 1871-1948 173 1934-1968 160 Early works to 1900 148 1902-1974 136 1939-1945 125 1873-1932 118 1897-1937 114 Early works to 1800 111 1857-1935 97 1900 - 1999 88 19th century 75 1911-2009 71 Geschichte 71 1914-1918 70 21st century 68 1907-1966 67 20e siècle 62 1745-1799 61 1740-1810 60 1838-1917 57 1912-1977 45 1900-1944 43 1904-1938 40 1863-1947 39 1930- 32 1889-1972 31 1898-1988 31 see all ...

United States 7,997 Soviet Union 1,407 Outer space 1,230 Germany 807 Great Britain 709 France 637 Russia (Federation) 528 Italy 489 China 459 Moon 412 California 382 Mars (Planet) 315 Europe 301 Japan 287 Canada 255 Russia 207 États-Unis 185 New York (State) 176 Australia 168 États-Unis 156 Poland 155 Brazil 143 India 136 England 128 Spain 90 New York 86 Alaska 77 Massachusetts 77 Indonesia 76 Illinois 72 see all ...