Columbia subject headings:
Chile--History--1824-1920.
Harvard subject headings:
Chile saltpeter industry--Social aspects--Chile--Tarapacá (Region)
Chile--History--1824-1920
Escuela Santa María (Iquique, Chile)--History.
Iquique (Chile)--History--20th century.
Massacres--Chile--Iquique--History--20th century.
Strikes and lockouts--Chile--Iquique--History--20th century.
Princeton subject headings:
Chile--History--1824-1920.
Iquique (Chile)--History--20th century.
Massacres--Chile--Iquique--History--20th century.