- Petersen, William E., 1906-19852
- Pollack, Robert, 1940-2
- Presbyterian Church in America2
- Presbyterian Hospital (New York, N.Y.)2
- Progressive Labor Party2
- Pupin, Michael, 1858-19352
- Radical Faculty Group2
- Rockefeller Center2
- Rockefeller Foundation2
- Runyon, Marie M2
- Rupp, George2
- Shanet, Howard2
- St. Stephen's College (Annandale-on-Hudson, N.Y.)2
- Student Mobilization Committee (U.S.)2
- Student Mobilization Committee to End the War in Vietnam a.k.a. SMC2
- Students for a Free Campus2
- Varsity Show (Columbia University)2
- Vickrey, William S (William Spencer), 1914-2
- Wagley, Charles, 1913-2
- Williams, Talcott, 1849-19282