Columbia subject headings:
Photography, Artistic--Exhibitions.
Zubiaurre, Ramón de, 1882-1969--Exhibitions.
Zubiaurre, Valentín de, 1879-1963--Exhibitions.
Harvard subject headings:
Photography, Artistic--Exhibitions
Zubiaurre, Ramón de, 1882-1969--Exhibitions.
Zubiaurre, Valentín de, 1879-1963--Exhibitions.
Princeton subject headings:
Photography, Artistic--Exhibitions.
Zubiaurre, Ramón de, 1882-1969--Exhibitions.
Zubiaurre, Valentín de, 1879-1963--Exhibitions.