[Use of flat Frenel's lenses for increasing close-up visual acuity in persons with poor vision].
Autor: | Lebekhov PI, Kerova IK, Krizhevskaia FV, Zhdanov DD |
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Jazyk: | ruština |
Zdroj: | Vestnik oftalmologii [Vestn Oftalmol] 1974 Nov-Dec (6), pp. 52-4. |
Databáze: | MEDLINE |
Externí odkaz: |