@misc{indiciae0cdbd0ab6954,
  title = {Geology of the petroleum and coal deposits in the North China basin, eastern China},
  author = {K. Y. Lee},
  year = {1986},
  doi = {10.3133/ofr86154},
  url = {https://pubs.usgs.gov/publication/ofr86154},
  note = {Source identifier: ofr86154}
}