Columbia subject headings:
Man Ray, 1890-1976--Correspondence.
Man Ray, 1890-1976--Exhibitions.
Photography, Artistic--Exhibitions.
Harvard subject headings:
Artists--Correspondence.
Howald, Ferdinand--Correspondence.
Man Ray, 1890-1976--Correspondence.
Man Ray, 1890-1976--Exhibitions.
Photography, Artistic--Exhibitions
Princeton subject headings: