Columbia subject headings:
Chile--Politics and government--1970-1973.
Labor unions--Chile.
Syndicalism--Chile.
Working class--Chile.
Harvard subject headings:
Collective labor agreements--Chile.
Labor policy--Chile.
Labor unions--Chile
Syndicalism--Chile.
Princeton subject headings:
Collective labor agreements--Chile.
Labor policy--Chile.
Labor unions--Chile.
Syndicalism--Chile.