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  1. 40507751800
    Author(s):Strandbygård, B.
    Title:[Trifocal glasses]
    Subject(s):Eyeglass [ and spectacle ] Lens, bi- and multifocal
    Journal Title Abbreviation:Hospitalstidende
    Date of Publication:1931
    Pagination:74: Oft. Selsk. Forh., 38–40.
    Language:Swedish
    Type of Resource:Analytic
    Series/Volume/Page:Series 4/Volume 5/Page 775
  2. 40507751860
    Author(s):Rønne, H.
    Title:[Movements of light through spectacles and their correction with concave lenses]
    Subject(s):Eyeglass [ and spectacle ] Lens, concave
    Journal Title Abbreviation:Hospitalstidende
    Date of Publication:1921
    Pagination:64: Dansk. otolar. selsk. forh., 48.
    Language:Swedish
    Type of Resource:Analytic
    Series/Volume/Page:Series 4/Volume 5/Page 775