Chr. Collin: <i>Studier og portræter</i>. Kristiania, 1901.
<bdi><a href="https://en.wikipedia.org/wiki/en:Christen_Collin" class="extiw" title="w:en:Christen Collin"><span title="Norwegian historian (1857-1926)">Christen Collin</span></a>
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