@misc{indiciae57c8a25921e9,
  title = {Paleomagnetism of the Mississippi Valley-type Zn-Pb deposits of the Silesian-Cracow area, Poland},
  author = {David T. A. Symons and D. F. Sangster and D. L. Leach},
  year = {1996},
  url = {https://pubs.usgs.gov/publication/70018190},
  note = {Source identifier: 70018190}
}