Columbia subject headings:
Livestock--Portugal--History.
Livestock--Spain--History.
Middle Ages.
Transhumance--Portugal--History.
Transhumance--Spain--History.
Harvard subject headings:
Livestock--Portugal--History.
Livestock--Spain--History.
Middle Ages.
Transhumance--Portugal--History.
Transhumance--Spain--History.
Princeton subject headings:
Livestock--Breeding--Portugal--History.
Livestock--Breeding--Spain--History.