Columbia subject headings:
Collective bargaining--Europe, Eastern--Congresses.
Collective labor agreements--Europe, Eastern--Congresses.
Labor laws and legislation--Europe, Eastern--Congresses.
Labor unions--Law and legislation--Europe, Eastern--Congresses.
Harvard subject headings:
Collective bargaining--Europe, Eastern.
Collective labor agreements--Europe, Eastern.
Labor laws and legislation--Europe, Eastern.
Labor unions--Law and legislation--Europe, Eastern.
Princeton subject headings: