Columbia subject headings:
Gundlach, F. C.--Art collections--Exhibitions.
Photography, Artistic--Exhibitions.
Harvard subject headings:
Gundlach, F. C.--Photograph collections--Exhibitions.
Photograph collections--Germany--Exhibitions.
Photography, Artistic--20th century--Exhibitions.
Princeton subject headings:
Gundlach, F. C.--Photograph collections--Exhibitions.
Photograph collections--Germany--Exhibitions.
Photography, Artistic--20th century--Exhibitions.