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Autor:
EßER, GREGOR1 (AUTHOR) gregor.esser@rwe.com, JANZ, SANDRA2 (AUTHOR) sandra.janz@rwe.com, WALTHER, HENNING3 (AUTHOR) ernst-henning.walther@rwe.com
Publikováno v:
World of Mining: Surface & Underground. 2017, Vol. 69 Issue 6, p327-334. 8p. 8 Color Photographs, 1 Diagram, 2 Graphs, 1 Map.