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Authors
- Packard, E. P. W. (Elizabeth Parsons Ware), 1816-1897 author3
- Page, Charles W. (Charles Whitney), 1845-1
- Paine, Martyn, 1794-18771
- Palmer, B. Frank (Benjamin Franklin) author1
- Parker, Horatio N. (Horatio Newton), 1871-1946, author1
- Parsons, Usher, 1788-18682
- Parvin, Theophilus, 1829-1898 author1
- Patrick, Thomas W. (Thomas William), 1872-1953 author1
- Pattee, Alida Frances, author1
- Patton, William W. (William Weston), 1821-18891
- Peabody, Andrew P. (Andrew Preston), 1811-18931
- Peabody, Andrew P. (Andrew Preston), 1811-1893 author1
- Peale, A. C. (Albert Charles), 1849-19131
- Peale, A. C. (Albert Charles), 1849-1913 author8
- Peale, A. C. (Albert Charles), 1849-1913, author1
- Peck, W. F. (Washington F.), 1841-18911
- Peebles, H. E. (Henry E.), 1812-1871 author1
- Peet, Harvey Prindle, 1794-18731
- Pendleton, Lewis W., 1844-1898 author1
- Pennsylvania. Department of Health. Bureau of Drug Control.1