Columbia subject headings:
Harvard subject headings:
Castelo Branco (Portugal : District)--Antiquities.
Mills and mill-work--Portugal--Castelo Branco (District)--History.
Mills and mill-work--Portugal--Ocreza River Region--History.
Ocreza River Region (Portugal)--Antiquities.
Princeton subject headings:
Castelo Branco (Portugal : District)--Antiquities.
Mills and mill-work--Portugal--Castelo Branco (District)--History.
Mills and mill-work--Portugal--Ocreza River Region--History.
Ocreza River Region (Portugal)--Antiquities.