Columbia subject headings:
Jewelers--Spain--Zaragoza--History--Sources.
Silversmiths--Spain--Zaragoza--History--Sources.
Harvard subject headings:
Jewelers--Spain--Zaragoza--History--Sources.
Silversmiths--Spain--Zaragoza--History--Sources.
Princeton subject headings:
Jewelers--Spain--Zaragoza--History--Sources.
Silversmiths--Spain--Zaragoza--History--Sources.