Llibre 9,803 Actes de congresos 446 Revista 292 Publicació Periòdica 270 Document de govern 264 Electrònic 109 Desconegut 69 Thesis 38 Paquet 8 Manuscrit 8 Mapa 7 Foto 4 Capítol de llibre 2 Material de referència 2 Objecte físic 1 veure tots ...

T - Tecnologia 10,493

Rupp Collection (Athenaeum of Philadelphia) 139 American Society of Mechanical Engineers Rail Transportation Division 111 United States Federal Railroad Administration. Office of Research and Development 65 United States Federal Railroad Administration 60 Vehicular Technology Society 48 IEEE Xplore (Online service) 45 American Railway Engineering Association 44 Institution of Mechanical Engineers (Great Britain) Railway Division 44 Association of American Railroads 43 Institute of Electrical and Electronics Engineers 40 Nock, O. S (Oswald Stevens), 1905-1994 37 National Research Council (U.S.) Transportation Research Board 35 ebrary, Inc 33 American Society for Testing Materials 31 Kirkman, Marshall M (Marshall Monroe), 1842-1921 31 United States Bureau of Standards 28 History of Science Collection (Brown University) 26 American Railway Association 25 American Society of Mechanical Engineers 25 Durst, Seymour B., 1913-1995 25 Springirth, Kenneth C 25 United States Urban Mass Transportation Administration 25 Grant, H. Roger, 1943- 23 Institution of Civil Engineers (Great Britain) 23 Institution of Engineering and Technology Railway Network 23 Institution of Mechanical Engineers (Great Britain) 23 Middleton, William D., 1928-2011 23 Institution of Railway Signal Engineers 22 Searles, William H (William Henry), 1837-1921 22 De Leuw, Cather & Company 21 veure tots ...

English 7,893 German 755 French 643 Russian 342 Chinese 207 Spanish 204 Italian 174 Japanese 136 Polish 57 Dutch 54 Portuguese 46 Turkish 22 Czech 18 Korean 18 Swedish 17 Danish 15 Greek 11 Norwegian 11 Hungarian 9 Finnish 8 Ukrainian 8 Undetermined 8 Arabic 7 Estonian 7 Slovak 7 Afrikaans 6 Indonesian 6 Catalan 5 Bulgarian 4 Hebrew 4 veure tots ...

History 1,687 Pictorial works 767 Congresses 518 Periodicals 417 Conference papers and proceedings 411 Biography 204 Electronic books 204 Illustrated works 166 Handbooks, manuals, etc 158 Handbooks and manuals 112 Biographies 96 Dictionaries 94 Juvenile literature 78 Early works to 1850 76 Exhibitions 71 Catalogs 58 Early works 57 Exhibition catalogs 52 Printed ephemera 42 Ouvrages illustrés 36 Directories 35 Bibliography 34 Congrès 34 Juvenile works 34 Specifications 33 Guidebooks 31 Books 24 Tables 23 Autobiographies 22 Technical reports 22 veure tots ...

20th century 203 19th century 98 1900-1999 65 1781-1848 39 1800-1899 33 1861-1919 25 1800-1999 24 21st century 21 1900 - 1999 18 20e siècle 18 1803-1859 17 Geschichte 15 Early works to 1850 14 1914-2001 9 1786-1875 8 1806-1859 7 1818-1899 7 1898-1951 7 1939-1945 7 Revolution, 1917-1921 7 1830-1913 6 1900-2099 6 20e siècle 6 1800 - 1899 5 1853-1943 5 1876-1952 5 1945-1990 5 19th Century 5 Revolution, 1905-1907 5 1796-1877 4 veure tots ...

United States 1,014 Great Britain 446 New York (State) 369 England 352 France 276 New York 258 Germany 228 Pennsylvania 223 China 169 California 139 Russia (Federation) 139 Japan 133 Europe 120 Massachusetts 119 Italy 115 London 105 Canada 97 Illinois 96 Soviet Union 89 Switzerland 86 Ireland 78 Australia 73 English Channel 72 Chicago 69 West (U.S.) 65 Paris 62 New York (N.Y.) 59 Austria 58 Berlin 56 Hoosac Tunnel (Mass.) 53 veure tots ...