Columbia subject headings:
Castile (Spain)--Commerce--History.
Fairs--Spain.
Leon (Kingdom)--Commerce--History.
Markets--Spain.
Harvard subject headings:
Castile (Spain)--Commerce--History.
Fairs--Spain.
León (Spain)--Commerce--History.
Markets--Spain.
Princeton subject headings:
Castile (Spain)--Commerce--History.
Léon, Spain (Kingdom)--Commerce--History.
Markets--Spain.
Spain--Fairs.