journalistic
article
Keidel, Hermann (1961):Das Rätsel von Hildburghausen.
In: Thüringer Heimatkalender, page 82-86.
Verlag Dr. Ludwig Nonnes Erben - Würzburg
Content:
Keidel informs about the "Secret of Hildburghausen" and the
events in the live of the Dark Count and the Dark Countess.