Names
- O'Connor, Jessie Lloyd1
- O'Connor, Jessie Lloyd, 1904-1
- Oberlin College.1
- Olmstead, Mildred Scott1
- Olmsted, Mildred Scott, 1890-1990.1
- Oxnam, G. Bromley (Garfield Bromley), 1891-1963.1
- Page, Kirby, 1890-1957.1
- Paul, Alice, 1885-1977.1
- Pauling, Linus, 1901-1
- Pauling, Linus, 1901-1994.1
- Peace and Environmental Coalition Against Nuclear Weapons.1
- People's Council of America.1
- Pike, James A. (James Albert), 1913-1969.1
- Porter, David R1
- Porter, David R.1
- Prohibition Party (U.S.). National Committee.1
- Puri, J. N.1
- Puri, J.N.1
- Randall, Mercedes1
- Randall, Mercedes.1