Journal 23,874 Serial 12,069 Government Document 3,492 Book 730 Electronic 706 Conference Proceeding 590 Newspaper 26 Reference Material 23 Article 7 Kit 6 Unknown 5 Map 3 Manuscript 2 Thesis 1 see all ...

Institute of Electrical and Electronics Engineers 525 Adam Matthew Digital (Firm) 328 United States Internal Revenue Service 313 Institution of Electrical Engineers 158 United States Bureau of Mines 148 Massachusetts Institute of Technology 130 American Society of Mechanical Engineers 122 Epstean Collection of Books on Photography and Its Applications in the Graphic Arts (Columbia University. Rare Book and Manuscript Library) 120 American Society of Civil Engineers 112 United States Federal Aviation Administration 112 United States National Aeronautics and Space Administration 96 Institution of Civil Engineers (Great Britain) 90 Institution of Engineering and Technology 90 American Chemical Society 89 R.S. Means Company 82 United States Energy Information Administration 79 IEEE Computer Society 77 United States Environmental Protection Agency 75 Society of Automotive Engineers 74 United States Department of Energy 74 Institution of Mechanical Engineers (Great Britain) 73 Consultants Bureau 72 IEEE Communications Society 65 Geological Survey (U.S.) 61 Gotham Book Mart Collection (University of Pennsylvania) 61 Association for Computing Machinery 59 United States Patent and Trademark Office 59 United States Office of Energy Markets and End Use 55 United States Office of Coal, Nuclear, Electric, and Alternate Fuels 53 Nihon Kikai Gakkai 52 see all ...

English 30,837 Chinese 1,691 French 1,562 German 1,521 Russian 916 Japanese 720 Spanish 671 Indonesian 259 Italian 186 Korean 176 Portuguese 169 Polish 104 Arabic 95 Multiple 94 Ukrainian 70 Dutch 69 Turkish 62 Czech 58 Romanian 52 Hebrew 48 Swedish 47 Persian 43 Croatian 42 Afrikaans 29 Thai 26 Danish 24 Vietnamese 23 Hungarian 22 Norwegian 21 Slovak 19 see all ...

20th century 106 21st century 56 19th century 44 2000-2099 22 1900-1999 21 1800-1899 10 1945- 8 2000 - 2099 7 1864-1946 6 1918-1945 6 1930-1949 6 1900 - 1999 5 1939-1945 5 1941- 5 1949- 5 1950- 5 1960- 5 18th century 4 1910-1930 4 1918-1972 4 1950-1959 4 1965-1975 4 Since 1945 4 1878-1967 3 1947- 3 Early works to 1800 3 1288-1918 2 1868-1912 2 1868-1999 2 1883-1966 2 see all ...

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