Columbia subject headings:
Chocolate--Early works to 1800.
Chocolate--Physiological effect.
Harvard subject headings:
Chocolate--Early works to 1800.
Chocolate--Physiological effect.
Cocoa--Early works to 1800.
Princeton subject headings:
Chocolate--Early works to 1800.
Cocoa--Early works to 1800.
Cocoa--Therapeutic use--Early works to 1800.