圖書 72,102 Government Document 12,935 Conference Proceeding 5,961 序列 2,004 電子 1,813 雜誌 1,734 Thesis 482 未知 435 Reference Material 53 工具包 39 音頻 38 照片 28 手稿 24 Book Chapter 13 地圖 1 樂譜 1 報紙 1 查看所有 ...

T - Technology 76,812

United States National Aeronautics and Space Administration 4,972 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 761 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) 541 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 275 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 查看所有 ...

English 65,523 French 3,630 Russian 3,403 German 2,912 Italian 1,111 Chinese 752 Spanish 664 Japanese 349 Portuguese 252 Polish 212 Dutch 152 Czech 86 Indonesian 80 Hebrew 67 Swedish 64 Arabic 57 Korean 49 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 查看所有 ...

Congresses 7,470 Conference papers and proceedings 6,209 History 5,007 Biography 3,314 Electronic books 3,164 Periodicals 2,592 Technical reports 2,252 Biographies 1,905 Pictorial works 1,014 Handbooks, manuals, etc 810 Dictionaries 655 Juvenile literature 570 Handbooks and manuals 508 Statistics 476 Catalogs 467 Bibliography 286 Autobiographies 272 Directories 267 Juvenile works 250 Popular works 234 Exhibitions 224 Early works to 1900 204 Illustrated works 204 Tables 198 Government publications 185 Observations 171 Exhibition catalogs 155 Early works to 1800 136 Video recordings 128 Anecdotes 124 查看所有 ...

20th century 945 1900-1999 436 1867-1912 173 1871-1948 173 1934-1968 160 Early works to 1900 148 1902-1974 135 1939-1945 125 1873-1932 116 1897-1937 114 Early works to 1800 111 1857-1935 97 1900 - 1999 87 19th century 75 1911-2009 71 Geschichte 71 1914-1918 69 21st century 68 1907-1966 67 1745-1799 61 1740-1810 60 1838-1917 57 20e siècle 57 1912-1977 45 1900-1944 43 1904-1938 40 1863-1947 39 1930- 32 1889-1972 31 1898-1988 31 查看所有 ...

United States 7,988 Soviet Union 1,404 Outer space 1,228 Germany 805 Great Britain 707 France 636 Russia (Federation) 526 Italy 489 China 456 Moon 410 California 381 Mars (Planet) 315 Europe 301 Japan 286 Canada 255 Russia 207 États-Unis 180 New York (State) 176 Australia 168 Poland 155 États-Unis 153 Brazil 141 India 136 England 128 Spain 90 New York 86 Alaska 77 Massachusetts 77 Indonesia 76 Illinois 72 查看所有 ...