KopjeHolck, Conrad ¬von¬ gebruikt in: Integrated Authority File (GND), Germany
Grev Frederik Vilhelm Conrad Holck. 1742-1800. [Unidentified painter / Scan from Danmarks Riges Historie volume 5 by Edvard Holm, 1907 (scan by Saddhiyama) -- Public domain -- http://commons.wikimedia.org/wiki/File:Konrad Holck.jpg]