Columbia subject headings:
Museo del Prado--Catalogs.
Painting--Spain--Madrid--Catalogs.
Harvard subject headings:
Art, Spanish--Guidebooks.
Art--Spain--Madrid--Guidebooks.
Museo del Prado--Guidebooks.
Princeton subject headings:
Art--Spain--Madrid--Guidebooks.
Guidebooks.
Museo del Prado--Guidebooks.