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Authors
- Pepper, William, 1874-1947, author1
- Platt, Charles, 1869-1
- Platt, Charles, 1869- author1
- Porter, William Townsend, 1862-1949, author1
- Prentiss, Charles William, 1874-1915 author1
- Prescott, A. B. (Albert Benjamin), 1832-19051
- Proctor, C. W., author1
- Provincial Board of Health of Ontario, author.1
- Pyle, William Henry, 1875- author1