- Jury4
- Kilgore, Harley Martin, 1893-19561
- Labor laws and legislation1
- Lander College1
- Lawyers1
- Legislators5
- Letter carriers1
- Livestock productivity1
- Magnuson, Warren G. (Warren Grant), 1905-19891
- Mason, Norman P.1
- Maybank, Burnet R. (Burnet Rhett), 1899-19542
- McCarthy, Joseph, 1908-19571
- McCormick, Stephen (Stephen J.), 1914-20121
- McHugh, M. L. (Matthew Lee), 1899-19851
- Military Government Association (U.S.)2
- Military government2
- Military readiness8
- Military spending2
- Mundt, Karl E. (Karl Earl), 1900-19741
- Mutual Broadcasting System1