Public announcment of blackout as a result of German occupation of Denmark during WW2
Unknown author<span style="display: none;">Unknown author</span>
After 9 April 1940
<a rel="nofollow" class="external free" href="https://samlinger.natmus.dk/FHM/asset/162683">https://samlinger.natmus.dk/FHM/asset/162683</a>