Columbia subject headings:
Harvard subject headings:
Automobile industry workers--Labor unions--Argentina--Córdoba (Province)--History.
Railroads--Employees--Labor unions--Argentina--Córdoba (Province)--History.
Sindicato de Trabajadores Concord (Córdoba, Argentina)--History.
Sindicato de Trabajadores de Materfer (Córdoba, Argentina)
Princeton subject headings:
Automobile industry workers--Labor unions--Argentina--Córdoba (Province)--History.
Railroads--Employees--Labor unions--Argentina--Córdoba (Province)--History.
Sindicato de Trabajadores Concord (Córdoba, Argentina)--History.
Sindicato de Trabajadores de Materfer (Córdoba, Argentina)