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Grenzmark PW. en PosenWest Prussia de Grenzmark PosenWestpreuen own drawing of Information Putzger Historischer Weltatlas Auflage Westermanns Groer Atlas zur Weltgeschichte Haacks geographischer Atlas VEB Hermann Haack GeographischKartographische Anstalt Gotha Auflage Ziegelbrenner GNU FDL unknown Kartenwerkstatt Maps