Columbia subject headings:
Compañía Telefónica Nacional de España--Archives--History.
Compañía Telefónica Nacional de España--Pictorial works--Catalogs.
Documentary photography--Spain--Catalogs.
Spain--History--Pictorial works--Catalogs.
Telecommunication--Spain--Pictorial works--Catalogs.
Harvard subject headings:
Compañía Telefónica Nacional de España--Archives--History.
Compañía Telefónica Nacional de España--History--Exhibitions.
Compañía Telefónica Nacional de España--History--Pictorial works--Exhibitions.
Compañía Telefónica Nacional de España--Pictorial works--Catalogs.
Documentary photography--Spain--Catalogs.
Spain--History--Pictorial works--Catalogs.
Telecommunication--Spain--Pictorial works--Catalogs.
Telephone companies--Spain--History--Exhibitions.
Telephone companies--Spain--History--Pictorial works--Exhibitions.
Telephone--Spain--History--Exhibitions.
Telephone--Spain--History--Pictorial works--Exhibitions.
Princeton subject headings:
Fundación Telefónica (Madrid, Spain)--Photograph collections--Exhibitions.
Photography, Artistic--Private collections--Spain--Madrid--Exhibitions.
Photography--Spain--History--20th century--Exhibitions.
Spain--Pictorial works--Exhibitions.
Spain--Social life and customs--20th century--Pictorial works--Exhibitions.