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Authors
- Cheney, Frederick E. (Frederick Edward), 1862-1924, author1
- Howe, Lucien, 1848-1928 author1
- Johnson, Walter B. (Walter Buckley), 1856-1925 author1
- Landesberg, M. (Max), 1840-1895 author1
- Lippincott, J. A. (James Aubrey), 1847-1938 author1
- Pennsylvania. State Board of Health and Vital Statistics, author.1