@misc{indiciaefcf52a6e03c1,
  title = {In situ capture gamma-ray analysis of coal in an oversize borehole},
  author = {J.L. Mikesell and D.W. Dotson and F. E. Senftle and R.S. Zych and J. Koger and L. Goldman},
  year = {1983},
  doi = {10.1016/0167-5087(83)90494-5},
  url = {https://pubs.usgs.gov/publication/70011384},
  note = {Source identifier: 70011384}
}