Columbia subject headings:
Harvard subject headings:
Coffee drinking--Germany--History--20th century.
Coffee drinking--History--20th century.
Coffee industry--Central America--History--20th century.
Coffee industry--History--20th century.
Princeton subject headings:
Coffee drinking--Germany--History--20th century.
Coffee drinking--History--20th century.
Coffee industry--Central America--History--20th century.
Coffee industry--History--20th century.