@misc{indiciaeb90cc0ace6cf,
  title = {Depositional environments and tectonic controls on the coal-bearing Lower to Middle Jurassic Yan'an Formation, southern Ordos Basin, China},
  author = {E. A. Johnson and Liu Shu and Zhang Yonglin},
  year = {1989},
  doi = {10.1130/0091-7613(1989)017<1123:deatco>2.3.co;2},
  url = {https://pubs.usgs.gov/publication/70015305},
  note = {Source identifier: 70015305}
}