Table 91 of collected seals from the medieval Duchy of Mecklenburg.
<bdi><a href="https://www.wikidata.org/wiki/Q108410" class="extiw" title="d:Q108410"><span title="German journalist (1844-1918)">Adolf Matthias Hildebrandt</span></a>
</bdi>
1913
Mecklenburgisches Urkundenbuch Bd. 24