- Pflaum, Irving P. (Irving Peter), 1906-19851
- Pleydell, Albert1
- Plymouth Oil Company1
- Porter, Harry H., 1900-19711
- Post, E. D.1
- Prentice-Hall personnel management series1
- Quapaw Nation1
- Rahall, Nick J., 1949-1
- Raspberry, William1
- Raushenbush, Stephen, 1896-19911
- Rayburn, Sam, 1882-19611
- Reader's Digest Association1
- Republic Aviation Corporation1
- Republican National Committee (U.S.). Women's Division1
- Republican National Convention1
- Republican National Convention (9th : 1888 : Chicago, Ill.)1
- Research Institute1
- Rhode Island Realtors Association, Inc.1
- Ribicoff, Abraham, 1910-19981
- Richardson, William S.1
