Não informado. (2018). The Ophthalmic Year Book. The Herrick Book and Stationery Company.
Chicago-viite (17. p.)Não informado. The Ophthalmic Year Book. Denver, Colo: The Herrick Book and Stationery Company, 2018.
MLA-viite (8. p.)Não informado. The Ophthalmic Year Book. The Herrick Book and Stationery Company, 2018.
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