Norris, G. W., & Norris, W. F. (1886). The early history of medicine in Philadelphia. By George W. Norris. [Collins Printing House].
Lua i Stíl Chicago (17ú heag.)Norris, George W., agus William Fisher Norris. The Early History of Medicine in Philadelphia. By George W. Norris. Philadelphia: [Collins Printing House], 1886.
Lua MLA (8ú heag.)Norris, George W., agus William Fisher Norris. The Early History of Medicine in Philadelphia. By George W. Norris. [Collins Printing House], 1886.
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