Columbia subject headings:
Ethnology--Portugal--Trás-os-Montes e Alto Douro.
Trás-os-Montes e Alto Douro (Portugal)--Social life and customs.
Harvard subject headings:
Ethnology--Portugal--Trás-os-Montes e Alto Douro.
Trás-os-Montes e Alto Douro (Portugal)--Social life and customs.
Princeton subject headings: