Authors: H.
- Patterson, H. DeF. -
- Patterson, J. H. (John Henry) 1867-1947
- Paulding, Hiram 1797-1878
- Paull, H. B., Mrs. 1812-1888
- Payne-Gaposchkin, Cecilia 1900-1979
- Payne, J. H. -
- Payne, William H. -
- Payne, William Harold 1836-1907
- Peake, Charles H. -
- Pearce, Ernest Harold 1865-1930
- Pearce, J. H. (Joseph Henry) 1856-
- Pearse, Henry H. S. 1844-1905
- Pearson, C. H. (Charles Henry) 1824-1906
- Pearson, P. H. (Peter Henry) 1864-1940
- Pear, T. H. (Tom Hatherley) 1886-1972
- Peck, Harry Thurston 1856-1914
- Peck, H. J. (Henry Jarvis) 1880-1964
- Peck, Rufus H. -
- Peel, W. H. -
- Pell, Stephen H. P. -
- Pentecost, Ernest H. (Ernest Harvey) 1868-1943
- Pepper, John Henry 1821-1900
- Percival, G. H. -
- Perdue, H. Avis (Hannah Avis) 1858-
- Perelaer, M. T. H. (Michael Theophile Hubert) 1831-1901
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