Columbia subject headings:
Harvard subject headings:
Huesca (Spain)--Commerce--History--To 1500--Sources.
Princeton subject headings:
Commerce--History--Medieval, 500-1500--Sources.
Customs administration--Spain--Huesca--History--Sources.
Huesca (Spain)--Commerce--History--Sources.
Huesca (Spain)--History--Sources.
Tariff--Spain--Huesca--History--Sources.
Tariff--Spain--Huesca--Registers.