Medical improvement: an address read to the Medical Society, by John Aitken, …, . Medical improvement: an address read to the Medical Society, by John Aitken, … Aitken, John, d. 1790. 35,p. ; 12⁰. Edinburgh : printed for and sold by John Bell, 1777. Reproduction of original from the National Library of Medicine. English Short Title Catalog, ESTCN3814. Electronic data. Farmington Hills, Mich. : Thomson Gale, 2003. Page image (PNG). Digitized image of the microfilm version produced in Woodbridge, CT by Research Publications, 1982-2002 (later known as Primary Source Microfilm, an imprint of the Gale Group).