Columbia subject headings:
Cameras--History.
Cameras--Private collections.
Photography--History.
Spira, S. F.--Photograph collections.
Harvard subject headings:
Cameras--Private collections.
Photography--History.
Spira, S. F.--Photograph collections.
Princeton subject headings:
Cameras--Private collections.
Photography--History.
Spira, S. F.--Photograph collections.