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The German publication “Deutsche Erde Zeitschrift für Deutschkunde” saw an article published in 1910 by Volga German historian and Catholic Priest, Konrad Keller. The article was entitled, “Die deutschen katholischen Kolonien auf der Bergseite der Wolga in Russland,” appearing in Deutsche Erde v.6/7 (1910): 184-192.
The article covers the Volga German colonies of Kamenka, Husaren, Volmer, Pfeifer, Hildmann, Leichtling, Koehler, Semenowka, Goebel, Marienfeld, Josephsthal, Schuck, Degott, Rothammel, and Seewald.