Columbia subject headings:
Collective labor agreements--Hospitals--United States.
Hospitals--Employees--Labor unions--Law and legislation--United States.
Harvard subject headings:
Collective labor agreements--Hospitals--United States.
Hospitals--Employees--Labor unions--Law and legislation--United States.
Princeton subject headings:
Collective labor agreements--Hospitals--United States.
Hospitals--Employees--Labor unions--Law and legislation--United States.