Columbia subject headings:
Anesthesia in dentistry--History--19th century.
Anesthesia in dentistry.
Chloroform.
Inhalation anesthesia--History--19th century.
Inhalation anesthesia.
Snow, John, 1813-1858.
Harvard subject headings:
Anesthesia--Case studies
Anesthesia--History--19th century.
Biographies.
Chloroform--Case studies.
Inhalation anesthesia--Case studies.
Inhalation anesthesia--History--19th century.
Snow, John, 1813-1858
Princeton subject headings:
Anesthesiologists--Great Britain--Biography.
Inhalation anesthesia--Great Britain--Case studies.
Inhalation anesthesia--Great Britain--History--19th century.
Snow, John, 1813-1858.