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  1. By: Holmboe, Jens
    Publication info: Kristiania [Oslo], J. Dybwad, A.W. Brøggers boktr, 1903
    Holding Institution: University Library, University of North Carolina at Chapel Hill
  1. By: Holmboe, Jens
    Type: Article
    In: Naturen : illustreret maanedsskrift for populaer naturvidenskab
    Volume: 31
    Date: 1907
    Page Range: 97-106
    Publication Info: Bergen E. B. Giertsen [etc.]