Columbia subject headings:
La Rioja (Spain)--History--Pictorial works.
Postcards--Spain--La Rioja--Catalogs.
Postcards--Spain--La Rioja--History.
Harvard subject headings:
Princeton subject headings:
Catalogs.
La Rioja (Spain)--History--Pictorial works.
Postcards--Spain--La Rioja--Catalogs.
Postcards--Spain--La Rioja--History.