1. The anesthetic zone in nitrous-oxid anesthesia Author(s): Thomas, John D. Publication: [Philadelphia? : s.n., 1893?] Subject(s): Nitrous Oxide -- pharmacologyAnesthesia
2. Nitrous oxide gas viewed from a practical standpoint Author(s): Thomas, John D. Publication: [Philadephia? : s.n., 1891?] Subject(s): Nitrous Oxide -- therapeutic useAnesthesia, Dental
