Creator
- Peterson, Franklin M1
- Pfeiffer Family1
- Plant System 1
- Pleas, Charles Earl1
- Ponder, Clara M.1
- Ponder, Ernest Ayer, 1918-19981
- Price, Elsie Goldsby1
- Pyburn, Nita Katharine1
- Reeves, G. H.1
- Rifkin, Jack, 1922-20021
- Ringleben, J., Jr. 1
- Rios, William1
- Ritchie, J. Lawrence1
- Roach, Ulysses B. (Ulysses Bracy)1
- Roberts, Theodore1
- Rohrer, Jessie C. (1891-1987)1
- Roselle, Anne1
- Rosen, Mary Sue, 1944-1
- Rosen, Paul, 1938-1
- Ryburn, May Louise Alexander1