Book 98,729 Government Document 9,552 Serial 8,559 Conference Proceeding 3,684 Journal 2,803 Electronic 1,584 Thesis 1,580 Unknown 697 Kit 92 Book Chapter 81 Manuscript 48 Reference Material 38 Audio 35 Map 32 Newspaper 25 Photo 21 Physical Object 3 Article 1 see all ...

H - Social Science 111,289 C - Historical Sciences 1

United States General Accounting Office 979 United States Federal Highway Administration 971 Organisation for Economic Co-operation and Development 913 National Research Council (U.S.) Transportation Research Board 694 United States Interstate Commerce Commission 636 United States Department of Transportation 631 United States Bureau of Public Roads 496 European Conference of Ministers of Transport 494 United States Board of Engineers for Rivers and Harbors 477 United States Urban Mass Transportation Administration 477 ebrary, Inc 472 Round Table on Transport Economics Paris, France 444 United States 425 United States Congress. House. Committee on Interstate and Foreign Commerce 422 United States Post Office Department 410 United States Congress. House. Committee on Merchant Marine and Fisheries 399 United States Federal Transit Administration 388 Rupp Collection (Athenaeum of Philadelphia) 361 United States National Highway Traffic Safety Administration 360 United States Congress. Senate. Committee on Interstate Commerce 338 United States Bureau of the Census 316 United States Congress. Senate. Committee on Interstate and Foreign Commerce 311 United States Army. Corps of Engineers 308 European Conference of Ministers of Transport Economic Research Centre 303 Transit Cooperative Research Program 282 Transit Development Corporation 260 United States Maritime Administration 253 United States Congress. House. Committee on Post Office and Civil Service 216 Association of American Railroads Railroad Committee for the Study of Transportation 211 United States National Transportation Safety Board 207 see all ...

English 78,573 French 6,348 German 5,658 Chinese 4,454 Spanish 4,223 Japanese 3,087 Italian 2,097 Russian 1,817 Portuguese 1,255 Indonesian 942 Korean 934 Dutch 685 Arabic 620 Polish 448 Turkish 422 Swedish 286 Hebrew 262 Greek 232 Vietnamese 228 Thai 198 Danish 190 Norwegian 177 Finnish 143 Multiple 131 Czech 123 Afrikaans 103 Hindi 92 Croatian 90 Hungarian 90 Persian 88 see all ...

History 13,519 Periodicals 7,913 Statistics 4,350 Congresses 4,133 Electronic books 3,693 Conference papers and proceedings 3,016 Pictorial works 1,376 Biography 1,129 Directories 1,023 Catalogs 912 Case studies 818 Biographies 679 Academic theses 596 Sources 587 Technical reports 566 Handbooks, manuals, etc 490 Thèses et écrits académiques 478 Printed ephemera 435 Legislative hearings 416 Dictionaries 374 Bibliography 333 Handbooks and manuals 304 Exhibitions 284 Maps 238 Telephone directories 234 dissertations 232 doctoral dissertations 224 masters theses 224 theses 224 Academic Dissertation 223 see all ...

20th century 2,353 19th century 1,349 1900-1999 982 1800-1899 438 21st century 419 1900 - 1999 274 17th century 231 18th century 209 1800-1999 180 20e siècle 180 To 1500 174 1800 - 1899 166 2000-2099 144 1939-1945 136 Geschichte 135 Early works to 1800 98 1945- 97 19e siècle 82 20e siècle 67 1800 - 1999 63 1900-2099 58 16th century 55 James I, 1603-1625 51 1914-1918 49 1700-1799 47 Ming dynasty, 1368-1644 40 1603-1625 39 1939 - 1945 39 21e siècle 39 1700-1899 38 see all ...

United States 23,840 China 4,471 Great Britain 3,715 Germany 2,601 Japan 2,580 Europe 2,440 France 2,338 Canada 1,880 New York (State) 1,776 Italy 1,651 California 1,649 India 1,640 England 1,345 Massachusetts 1,140 Indonesia 1,095 Pennsylvania 1,028 Brazil 942 Soviet Union 883 Mexico 848 New York 791 Spain 734 Illinois 720 Korea (South) 688 Russia (Federation) 655 Argentina 651 Netherlands 590 Australia 585 Germany (West) 543 Asia 523 Turkey 504 see all ...