1. Technique of colour photography;Newens,1931
2. Photography with magnifying stereoscopic camera;Druner;Deutsche med. Wchnschr.,1933
3. von der Heydt, R., and Gradle, H. S. Atlas of stereo-photographs of the anterior segment of the eye. Chicago Medical Book Co.
4. Gamble, William B. Color photography. New York Public Library, 1924 (contains 2355 references).
5. Infrarotphotographie des Auges;Dekking;Arch. f. Ophth.,1933