| William Hardy Papers | Abstracts |
| Richard E. Harris Papers | Abstracts |
| Thomas A. Hendricks Papers | Abstracts |
| Westray Henney Papers | Abstracts |
| John Herling Papers | Abstracts |
| Bernard G. Hoffman Papers | Abstracts |
| Claude Hoffman Papers | Abstracts |
| Floyd Hoke-Miller Papers | Abstracts |
| Michael Hrabar Papers | Abstracts |
| Olga Hrabar Papers | Abstracts |
| Arthur Hughes Papers | Abstracts |
| William Humphreys Papers | Abstracts |
| Nicholas Hyshka Papers | Abstracts |
| Andres J. Ignasiak Papers | Abstracts |
| Illinois Labor History Society Records | Abstracts |
| Jack Conway Photographs | Abstracts |
| Mildred Jeffrey Papers | Abstracts |
| Newman Jeffrey Papers | Abstracts |
| Robert Kanter Papers | Abstracts |
| Raymond Kay Papers | Abstracts |
| William and Ann Kemsley Papers | Abstracts |
| Kenneth Forbes Papers | Abstracts |
| Kenosha Labor Records | Abstracts |
| Wanda Killian Papers | Abstracts |
| L. Bruce Kingery Papers | Abstracts |
| William Kircher Papers | Abstracts |
| Harvey Kitzman Papers | Abstracts |
| David Y. Klein Papers | Abstracts |
| E. H. Kohlhagen Papers | Abstracts |
| Alex Kovacs Papers | Abstracts |
| Joseph J. Kowalski Papers | Abstracts |
| Dorothy Kraus Papers | Abstracts |
| Henry Kraus Papers | Abstracts |
| Maynard Krueger Papers | Abstracts |
| Frank LaBita Papers | Abstracts |
| W. Jett Lauck Papers | Abstracts |
| Richard T. Leonard Papers | Abstracts |
| Edward Levinson Papers | Abstracts |
| James Lindahl Papers | Abstracts |
| Howard Lipton Papers | Abstracts |
| Ed Liska Papers | Abstracts |
| John W. Livingston Papers | Abstracts |
| Percy Llewellyn Papers | Abstracts |
| Frank Lohr Papers | Abstracts |
| Robert Lopez Papers | Abstracts |
| George Lutzai Papers | Abstracts |
| George Lyons Papers | Abstracts |
| Nora Maczko Papers | Abstracts |
| Olga Madar Papers | Abstracts |
| Michael Manning Papers | Abstracts |
