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  1. 40507771180
    Author(s):Heerfordt, C. F.
    Title:[Progress in the field of ophthalmologic optics]
    Subject(s):Eyeglass [ and spectacle ] Optics, physiological
    Journal Title Abbreviation:Ugeskr. læger
    Date of Publication:1914
    Pagination:76: 925–30.
    Language:Danish
    Type of Resource:Analytic
    Series/Volume/Page:Series 4/Volume 5/Page 777
  2. 40507771890
    Author(s):Blegvad, O.
    Title:Demonstration von Schutzbrillen.
    Subject(s):Eyeglass [ and spectacle ] protective
    Journal Title Abbreviation:Acta ophth.
    Place of Publication:Kbh.
    Date of Publication:1932
    Pagination:10: 195.
    Language:Danish
    Type of Resource:Analytic
    Series/Volume/Page:Series 4/Volume 5/Page 777