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  1. By: Bubák, František, - González Fragoso, R
    Type: Article
    In: Hedwigia
    Volume: 57
    Date: 1915
    Page Range: 1--13
    Publication Info: Dresden Verlag und Druck von C. Heinrich
  2. By: González Fragoso, R
    Type: Article
    In: Boletín de la Sociedad Española de Historia Natural
    Volume: 18
    Date: 1918
    Page Range: 363--376
    Publication Info: Madrid, Estab. tip. de Fortenet, 1901-1937
  3. By: González Fragoso, R
    Type: Article
    In: Boletín de la Sociedad Española de Historia Natural
    Volume: 18
    Date: 1918
    Page Range: 78--85
    Publication Info: Madrid, Estab. tip. de Fortenet, 1901-1937