Columbia subject headings:
Collective bargaining--Hospitals--Illinois.
Collective bargaining--Hospitals--Minnesota.
Collective bargaining--Hospitals--Wisconsin.
Harvard subject headings:
Collective bargaining--Hospitals--Illinois.
Collective bargaining--Hospitals--Minnesota.
Collective bargaining--Hospitals--Wisconsin.
Princeton subject headings:
Collective bargaining--Hospitals--Illinois.
Collective bargaining--Hospitals--Minnesota.
Collective bargaining--Hospitals--Wisconsin.