An oration, delivered before the Philadelphia Medical Society : on the 22d of February, 1820 Jackson, Samuel, 1787-1872. Medicine -- trends Philadelphia : M. Carey and Son, 1820 Addresses Text 38 p. nlm:nlmuid-2558051R-bk 2558051R http://resource.nlm.nih.gov/2558051R English The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/