Norwegian geologist <a href="https://no.wikipedia.org/wiki/Gunnar_Holmsen" class="extiw" title="no:Gunnar Holmsen">Gunnar Holmsen</a> (1880–1976)
Unknown photographer (not specified in book)
2015-11-02 14:31:57
Academic biographical book entitled "Norges filosofer og realister" published 1933 in Norway.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1">[1]</a></sup>