zugeschnittenes Porträt des Schweizer Astronoms Kaspar Gottfried Schweizer
<bdi><a href="https://en.wikipedia.org/wiki/en:Carl_Friedrich_Irminger" class="extiw" title="w:en:Carl Friedrich Irminger"><span title="Swiss draughtsman, lithographer and engraver">Carl Friedrich Irminger</span></a>
</bdi>
1838
<a href="https://en.wikipedia.org/wiki/Digital_object_identifier" class="extiw" title="w:Digital object identifier">doi</a>:<a rel="nofollow" class="external text" href="https://doi.org/10.3931%2Fe-rara-60907">10.3931/e-rara-60907</a>