Fire and battle damage inflicted on the Norwegian patrol boat Pol III from its action on April 8, 1940
Unknown author<span style="display: none;">Unknown author</span>
<a rel="nofollow" class="external free" href="http://www.forsvaretsmuseer.no/Aktuelt/Da-Pol-III-moette-overmakten-8.april-1940">http://www.forsvaretsmuseer.no/Aktuelt/Da-Pol-III-moette-overmakten-8.april-1940</a>