Keywords: Michael Birkeland by H C Olsen.png no Den norske historikeren Michael Birkeland Verdens Gang April 25 1885 http //urn nb no/URN NBN no-nb_digavishefte_135990 Creator H C Olsen 1885 or earlier PD-old-100 Michael Birkeland 1885 illustrations from Verdens Gang Engravings by Hans Christian Olsen |