| Description | Correspondence with Prof E Laurence Palmer; Gustav F Papanek; Cornelia S Parker; Helen Parkhurst; G Eric Peabody; F A Pearson; Robert L Pendleton; Henry F Perkins; E A Perregaux; Dea W Peterson; Nathalie Pierrepont; E Parmalee Prentice; Prof Robert A Polson; John A Pope (Freer Gallery); Cornell librarian Whiton Powell. |