1 “...Veröffentlichungen aus dem Deutschen Bergbau-Museum Bochum...”

2 “.... At the Ruhr University of Bochum where I began my studies, I am indebted to Professor Otto Poggeler (Director...”

3 “... on September 16th-18th, 2019, at CERES, Ruhr-Universität Bochum (Germany) focuses on two of the six thematic...”