Columbia subject headings:
Madrid (Spain)--In art--Exhibitions.
Madrid (Spain)--Social life and customs--Exhibitions.
Small business--Spain--Madrid--History--Exhibitions.
Working class in art--Exhibitions.
Working class--Spain--Madrid--History--Exhibitions.
Harvard subject headings:
Madrid (Spain)--In art--Exhibitions.
Madrid (Spain)--Social life and customs--Exhibitions.
Small business--Spain--Madrid--History--Exhibitions.
Working class in art--Exhibitions
Working class--Spain--Madrid--History--Exhibitions.
Princeton subject headings: