@article{HesselBuch2021,
  author    = {Werner Hessel and Corinne Buch},
  title     = {Exkursion: Kreis Unna, Bergkamen, Halde Großes Holz},
  journal   = {Jahrbuch des Bochumer Botanischen Vereins},
  volume    = {12},
  pages     = {168 -- 171},
  year      = {2021},
}