Konstantinos Panagiotopoulos

Konstantinos Panagiotopoulos

Seminar of Geography and Education, University of Cologne, Gronewald Str, 2, D-50931, Cologne, Germany

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Anne Aufgebauer

Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49a, D-50674, Cologne, Germany

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Frank Schäbitz

Seminar of Geography and Education, University of Cologne, Gronewald Str, 2, D-50931, Cologne, Germany

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Bernd Wagner

Institute of Geology and Mineralogy, University of Cologne, Zülpicher Str. 49a, D-50674, Cologne, Germany