Columbia subject headings:
Aizpúrua, José Manuel, 1902-1936--Exhibitions.
Labayen, Joaquín--Exhibitions.
Harvard subject headings:
Aizpúrua, José Manuel, 1902-1936--Exhibitions.
Architecture--Spain--History--20th century--Exhibitions
Labayen, Joaquín--Exhibitions.
Princeton subject headings:
Aizpúrua, José Manuel, 1902-1936--Exhibitions.
Labayen, Joaquín--Exhibitions.