Authors: w
- Post, Waldron Kintzing 1868-1955
- Potter, Burton Willis 1843-1927
- Potter, Ellis Wellington 1920-1981
- Potter, Margaret Horton 1881-1911
- Potts, William Sherman 1876-1930
- Pound, Ezra 1885-1972
- Powell, Alma Webster Hall 1869-1930
- Powell, David Franklin 1847-1906
- Powell, John Wesley 1834-1902
- Powell, William Robert 1876-
- Powell, Willis J. -
- Powers, George Whitefield 1834-1903
- Powers, Paul S. (Paul Sylvester) 1905-1971
- Power, Tyrone 1797-1841
- Power, William Henry, Sir 1842-1916
- Praed, Winthrop Mackworth 1802-1839
- Praeger, Ferdinand 1815-1891
- Prantner, Ferdinand 1817-1871
- Pratt, Louis W. -
- Pratt, Walter Merriam 1880-1973
- Pratt, William Edwin -
- Prescott, D. Clint -
- Prescott, Thomas H. 1810-1865
- Prescott, William Hickling 1796-1859
- Presland, John 1885-1975
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