Columbia subject headings:
Collective labor agreements--Health facilities--United States--Congresses.
Labor laws and legislation--United States--Congresses.
Labor unions--Health facilities--United States--Congresses.
Harvard subject headings:
Collective labor agreements--Health facilities--United States--Congresses.
Health facilities--Employees--Labor unions--United States--Congresses.
Labor laws and legislation--United States--Congresses
Princeton subject headings: