Columbia subject headings:
Hualgayoc (Peru : Province)--History.
Hualgayoc (Peru : Province)--Politics and government.
Hualgayoc (Peru : Province)--Social life and customs.
Mineral industries--Peru--Hualgayoc (Province)
Mineral industries--Peru--Hualgayoc (Province)--History.
Harvard subject headings:
Princeton subject headings:
Hualgayoc (Peru : Province)--History--20th century.
Mineral industries--Peru--Hualgayoc (Province)--History--20th century.