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Keywords: Geologische Kartenskizze des Oberilurs in Asker.jpg no Geologisk kartskisse over oversiluren i Asker 1908 Johan Kiær http //urn nb no/URN NBN no-nb_digibok_2009042212002 Der Obersilur im Kristianiagebiete Christiania Jacob Dybwad 1908 Johan Kiær 1869 “1931 Custom license marker 2012 10 11 PD-old PD-US Uploaded with UploadWizard Old maps of Akershus Geological maps of Norway |