Columbia subject headings:
Milk supply.
Milk trade.
Milk--Analysis.
Milk--Microbiology.
Milk.
Harvard subject headings:
Milk
Milk supply.
Milk trade.
Milk--Analysis
Milk--Microbiology
Milk--Testing
Princeton subject headings:
Milk supply.
Milk trade.
Milk--Analysis and examination.
Milk--Microbiology.
Milk.