1. Appraisal of the demand flow anesthetic machine and review of the literature;McCarthy;J Oral Surg,1969
2. Differences in metered and measured oxygen concentrations during nitrous oxide analgesia;Gauert;Anesth Analg,1968
3. Dental anesthesia and analgesia;Allen,1979
4. Department of Transportation, Office of Federal Regulations, National Archives Administration: Code of federal regulations, title 49, section 178, Washington, DC, 1986.
5. Anesthetic gas fires are preventable;Follmer;Anesth Prog,1972