@article{Rathje2007,
  author    = {Werner Rathje},
  title     = {Der Braunkohlenbergbau im Bergrevier Kassel},
  journal   = {Braunkohle, W{\"a}rme und Energie},
  volume    = {2},
  number    = {7-8},
  pages     = {97 -- 103},
  year      = {2007},
}