Authors: w
- Peterson, William 1856-1921
- Petherick, Horace 1839-1919
- Petrie, W. M. Flinders (William Matthew Flinders) 1853-1942
- Petrovic, Walter D. 1960-
- Petrovitch, Woislav M. 1884-1934
- Petty, George W. -
- Petty, William, Sir 1623-1687
- Peyton, Green 1907-1968
- Pfeiffer, F. W. -
- Pfeiffer, Sara 1829-1913
- Phelan, Earl W. 1900-1993
- Phelps, Elizabeth Stuart 1844-1911
- Phelps, William Lyon 1865-1943
- Philip, Alexander Philip Wilson 1770-1847
- Phillipps-Wolley, Clive 1854-1918
- Phillips, E. W. (Emma Watts) -
- Phillips, Henry Wallace 1869-1930
- Phillips, W. Brooks -
- Phillips, W. B. (Wesley Briggs) -
- Phillips, Wendell 1811-1884
- Phipps, Ramsay Weston 1838-1923
- Physick, N. W. (Nino William) 1890-1946
- Pickard-Cambridge, Arthur Wallace, Sir 1873-1952
- Pickens, William 1881-1954
- Pickthall, Marmaduke William 1875-1936
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