Columbia subject headings:
Blood gases.
Harvard subject headings:
Anesthesia--Early works to 1800.
Blood--Analysis--Early works to 1800.
Gases--Therapeutic use--Early works to 1800.
Oxygen therapy early--Early works to 1800.
Princeton subject headings:
Anesthesia--Early works to 1800.
Blood--Analysis.
Gases--Therapeutic use.
Oxygen therapy.
Respiratory therapy.