Columbia subject headings:
Detention of persons--Argentina.
Labor unions--Political activity--Argentina.
Missing persons--Argentina.
Peronism--Argentina.
Smith, Oscar.
Harvard subject headings:
Electric industry workers--Labor unions--Argentina--History.
Labor unions--Argentina--Political activity.
Peronism.
Smith, Oscar.
Smith, Óscar, 1932-
Syndicalism--Argentina.
Princeton subject headings:
Detention of persons--Argentina.
Labor unions--Argentina--Political activity.
Missing persons--Argentina.
Peronism--Argentina.
Smith, Oscar.