Book 51,027 Journal 4,020 Serial 3,353 Thesis 2,125 Government Document 1,849 Kit 1,817 Conference Proceeding 1,201 Unknown 1,067 Electronic 925 Newspaper 329 Audio 291 Manuscript 154 Book Chapter 61 Reference Material 39 Photo 25 Musical Score 9 Article 7 Map 3 Physical Object 2 see all ...

H - Social Science 31,795 K - Law 2,304 F - General American History 1,831 D - World History 834 P - Language and Literature 576 J - Political Science 556 L - Education 508 Z - Library Science 436 N - Fine Arts 353 M - Music 271 E - United States History 220 C - Historical Sciences 194 A - General Works 188 R - Medicine 182 T - Technology 105 B - Philosophy, Psychology, Religion 72 G - Geography, Anthropology, Recreation 64 U - Military Science 60 S - Agriculture 44 V - Naval Science 19 Q - Science 12 see all ...

United States Bureau of International Labor Affairs 320 United States Bureau of Labor Statistics 209 International Ladies' Garment Workers' Union 196 American Federation of Labor 191 De Gruyter 173 United States Congress 172 AFL-CIO 164 Trades Union Congress 146 International Labour Office 141 ebrary, Inc 135 Cole, G. D. H (George Douglas Howard), 1889-1959 124 Deutscher Gewerkschaftsbund 106 National Bureau of Economic Research 100 Congress of Industrial Organizations (U.S.) 92 European Trade Union Institute 88 Industrial Workers of the World 87 Air Line Pilots Association 85 Ellner, Steve 79 United States Office of Labor-Management Standards 76 Webb, Sidney, 1859-1947 76 United States National Labor Relations Board 75 Industriegewerkschaft Metall für die Bundesrepublik Deutschland 73 Amalgamated Clothing Workers of America 71 International Confederation of Free Trade Unions 71 United States Department of Labor 69 United States Congress. House. Committee on Education and Labor 67 United States Congress. House. Committee on Education and Labor. Subcommittee on Labor-Management Relations 67 Ḳol Yiśraʼel 66 International Union, United Automobile, Aircraft, and Agricultural Implement Workers of America Education Department 65 Amalgamated Clothing and Textile Workers Union 63 see all ...

English 33,758 Spanish 6,459 German 5,082 French 3,613 Russian 2,544 Italian 2,146 Japanese 1,653 Portuguese 1,247 Chinese 1,162 Korean 703 Hebrew 671 Polish 565 Arabic 495 Turkish 390 Dutch 372 Swedish 348 Indonesian 258 Vietnamese 223 Czech 193 Yiddish 178 Multiple 160 Hungarian 157 Danish 143 Croatian 130 Finnish 124 Catalan 116 Bulgarian 110 Greek 101 Norwegian 100 Ukrainian 66 see all ...

History 9,906 Periodicals 5,417 Congresses 2,305 Conference papers and proceedings 2,200 Biography 1,902 Electronic books 1,403 Biographies 1,046 Sources 823 Records (documents) 643 Interviews 608 Directories 590 Case studies 441 Statistics 412 Bibliography 383 Archives 362 Academic theses 356 Handbooks, manuals, etc 317 Newspapers 300 Thèses et écrits académiques 295 Correspondence 273 Documentary films 239 bibliografía 230 bibliographie 230 bibliography 230 reference 213 referencia 213 référence bibliographique 213 Oral histories (literary works) 211 Fiction 199 Drama 192 see all ...

20th century 4,539 1900-1999 1,947 1900 - 1999 1,046 19th century 624 1945- 435 21st century 371 20e siècle 276 1980-1989 215 1914- 195 1800-1899 191 Since 1945 175 1927-1993 141 2000-2099 131 1918-1945 109 1800-1999 107 1943- 107 1933-1945 106 Revolution, 1917-1921 100 20e siècle 97 1955-1983 96 1892-1982 85 Since 1900 83 1918- 78 1800 - 1899 77 1850-1924 70 Civil War, 1936-1939 64 1900-2099 62 1945-1989 62 1945-1980 61 1960- 61 see all ...