Berens, Conrad, 1889- Encyclopedia of the eye; diagnosis and treatment [by] Conrad Berens [and] Edward Siegel. - Philadelphia, Lippincott [1950] - 272 p. illus. (part col.) 20 cm. LCCN: 51000157 Nat. Bib. No.: GB51-1087 Subjects--Topical Terms: Ophthalmology--Dictionaries. LC Class. No.: RE21 / .B4 Dewey Class. No.: 617.703