"The History of Photography (from the earliest use of camera obscura in the eleventh century up to 1914)", Helmut Gernsheim, London-New York-Toronto 1955 : [recenzja]

Kwartalnik Historii Nauki i Techniki, Tom 3, Numer 1 (1958) s. 182
, Helmut Gernsheim (aut. dzieła rec.)