<a href="//commons.wikimedia.org/wiki/Category:Carl_Alstrup" title="Category:Carl Alstrup">Carl Alstrup</a>. Postcard by Theo Matejko, Wien, Projektograph, c. 1910
<bdi><a href="https://en.wikipedia.org/wiki/en:Theo_Matejko" class="extiw" title="w:en:Theo Matejko"><span title="Austrian painter and illustrator (1893-1946)">Theo Matejko</span></a>
</bdi>
<a rel="nofollow" class="external text" href="https://www.ebay.de/itm/Kunstlerkarte-1910-Theo-Matejko-Wien-Projektograph-15183/223450586096">ebay</a>