Columbia subject headings:
Harvard subject headings:
Dairying--Switzerland--Zurich--History.
Dried milk--Switzerland--Zurich--History.
Gerber, Niclaus, 1850-1914
Hunziker, Otto Frederick, 1873-
Milk supply--Switzerland--Zurich--History.
Toni-Molkerei (Zürich, Switzerland)--History.
Princeton subject headings:
Dairying--Switzerland--Zurich--History.
Dried milk--Switzerland--Zurich--History.
Gerber, Niclaus, 1850-1914.
Hunziker, Otto Frederick, 1873-
Milk supply--Switzerland--Zurich--History.
Toni-Molkerei Zürich (Firm)--History.