| Wanda Killian Papers | Abstracts |
| Raymond Koch and Charlotte Moskowitz Papers | Abstracts |
| Labor and Working Class History Association Records | Abstracts |
| Labor Notes Records | Abstracts |
| Labor Today Records | Abstracts |
| Labor's Non-Partisan League Records | Abstracts |
| John C. Leggett Papers | Abstracts |
| Herbert Lindberg Papers | Abstracts |
| C. Z. Lindsey Papers | Abstracts |
| Mrs. Stanley Lowe Papers | Abstracts |
| Jakub L. Lublinski Papers | Abstracts |
| Hugh Macmillan Papers | Abstracts |
| Mark Adams Radio Program Records | Abstracts |
| Mark Heinen Papers | Abstracts |
| Michigan Federation of Typographical Auxiliaries Records | Abstracts |
| Michigan Labor History Society Records | Abstracts |
| Annetta Miller Papers | Abstracts |
| T. Denton Miller Papers | Abstracts |
| David Moberg Papers | Abstracts |
| Tom Mooney Papers | Abstracts |
| Elizabeth Morgan Papers | Abstracts |
| James B. Morrissey Papers | Abstracts |
| Tom Myerscough Papers | Abstracts |
| NALC Department of Research and Education Records | Abstracts |
| NALC Executive Assistant to the President: F. John Miller Records | Abstracts |
| NALC Office of the President: James H. Rademacher Records | Abstracts |
| NALC Auxiliary Records | Abstracts |
| NALC Office of the Executive Vice President Records | Abstracts |
| NALC Office of the President: J. Joseph Vacca Records | Abstracts |
| NALC Office of the Secretary-Treasurer Records | Abstracts |
| NALC Office of the Vice President Records | Abstracts |
| National Campaign For Agricultural Democracy Records | Abstracts |
| National Caucus of Labor Committees Records | Abstracts |
| National Founders Association Records | Abstracts |
| National Policy Association Records | Abstracts |
| National Sharecroppers Fund Photographs | Abstracts |
| National Sharecroppers Fund Records | Abstracts |
| National War Labor Board Records | Abstracts |
| Ralph Orr Papers | Abstracts |
| Owosso Education Association Records | Abstracts |
| Frances D. and G. Lyman Paine Papers | Abstracts |
| Victor and Bernice Pasche Papers | Abstracts |
| Peabody Report | Abstracts |
| People's Song Library Records | Abstracts |
| Frances Perkins Papers | Abstracts |
| Carl Person Papers | Abstracts |
| Peter and Tom Wolf Papers | Abstracts |
| Henry J. Pfaff Papers | Abstracts |
| Norman E. Philleo Papers | Abstracts |
| Pinkerton's National Detective Agency Reports | Abstracts |
