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Credit
A treatise on diseases of the eye : for the use of students and general practitioners : to which is added a series of test types for determining the exact state of vision / by Henry C. Angell. Public Domain Mark. Source: Wellcome Collection.
Provider
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.