Columbia subject headings:
Surigao del Norte (Philippines)--Social life and customs.
Surigao del Sur (Philippines)--Social life and customs.
Harvard subject headings:
Surigao del Norte (Philippines)--History.
Surigao del Norte (Philippines)--Social life and customs.
Surigao del Sur (Philippines)--History.
Surigao del Sur (Philippines)--Social life and customs.
Princeton subject headings: