"The Greiner & Voigt Families" by Walter Braun - the genealogical work based largely on the work of Herbert kuenert and Udo Eichhorn whose extensive research was published in the Mitteldeutsche Famlienkunde. Kuenert's research lay in the history of the Thuringian glass industry while Eichhorn researched the families in church, civil and other documents including existing family histories.
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