Gernsheim, Helmut
The history of photography from the ear-
liest use of the camera obscura in the
eleventh century up to 191^- In collabora-
tion with Alison Gernsheim.
^:o London, New York & Toronto 1955*

Gernsheim, He 1 mu t
The history of photography from the ear-
liest use of the camera obscura in the
eleventh century up to 1914. In collabora-
tion with Alison Gernsheim.
4 :o London, New York & Toronto 1955 .