- Mexico.3
- Military assistance, American2
- Mills, Wilbur D. (Wilbur Daigh), 1909-19921
- Mississippi.1
- Moynihan, Daniel P. (Daniel Patrick), 1927-2003.2
- Murdoch, Rupert, 1931-1
- My Lai Massacre, Vietnam, 19681
- National Association for the Advancement of Colored People.1
- National Governors' Association.1
- National Press Club (U.S.)2
- National Security Council (U.S.)1
- National parks and reserves1
- National security--United States2
- National security--United States--Decision making.1
- Natural gas--United States.1
- New York (N.Y.)--History--1951-1
- Nicaragua--Politics and government--1979-1990.2
- Nixon, Richard M. (Richard Milhous), 1913-19946
- Nixon, Richard M. (Richard Milhous), 1913-1994--Impeachment1
- Nixon, Richard M. (Richard Milhous), 1913-1994.3