@misc{indiciaeae03f32a55ab,
  title = {Geology of petroleum and coal deposits in the North China Basin, Eastern China},
  author = {K. Y. Lee},
  year = {1989},
  doi = {10.3133/b1871},
  url = {https://pubs.usgs.gov/publication/b1871},
  note = {Source identifier: b1871}
}