Biographies of John King, Andrew Jackson Howe, and John Milton Scudder : accompanied by many valuable and historical portraits and other illustrations . Lloyd, Cincinnati, Ohio 1912 Digital edition by the University and State Library Düsseldorf
External linksedit
King's American Dispensatory @ Henriette Kress's Herbal website.
The Eclectic Materia Medica, Pharmacology and Therapeutics by Harvey Wickes Felter, M.D. (1922) Bookmarked Acrobat (.pdf) files only from Michael Moore's website.