Die Structur der Retina : dargestellt nach Untersuchungen über das Walfischauge / von Carl Ritter.
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Die Structur der Retina : dargestellt nach Untersuchungen über das Walfischauge / von Carl Ritter. Credit: This material has been provided by the Francis A. Countway Library of Medicine, through the Medical Heritage Library. The original may be consulted at the Francis A. Countway Library of Medicine, Harvard Medical School.. Public Domain Mark