@misc{indiciae14dce2e1d6d0,
  title = {Regional price targets appropriate for advanced coal extraction},
  author = {Terasawa, K. L. and Whipple, D. M.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19810007996},
  note = {Source identifier: 19810007996}
}