found: Das Stift St. Florin zu Koblenz, 1967:title page (Anton Diederich) page i (submitted as the author's dissertation to the Universität Bonn)
found: Vom Recht im Rheinland : Ausstellung 1969, 22. April bis 20. Juli, Kölnisches Stadtmuseum, 1969:title page verso (Toni Diederich)
found: Das Kölner Dom Jubiläumsbuch 1980 :title page (Toni Diederich)
found: Siegelkunde, 2012:title page (Toni Diederich) page vii (on his published dissertation, Das Stift St. Florin zu Koblenz, he used the name Anton Diederich)
found: German Wikipedia, viewed October 6, 2014(Toni Diederich; Anton Diederich; born November 18, 1939, in Eveshausen (Dommershausen); German historian and archivist; studied at Universität Bonn; from 1979 to 2004 he was director of the Historisches Archiv des Erzbistums Köln, the first layperson to hold that position)
