Thoughts on the subject of a health-establishment for the city of Philadelphia Caldwell, Charles, 1772-1853. Philadelphia (Pa.). Board of Health. Public Health Administration [Philadelphia? : s.n., 1803?] Philadelphian. Norris, George W. (George Washington), 1808-1875, former owner. Text 16 p. nlm:nlmuid-2545031R-bk 2545031R http://resource.nlm.nih.gov/2545031R English Philadelphia The National Library of Medicine believes this item to be in the public domain : https://creativecommons.org/publicdomain/mark/1.0/