@misc{indiciae50bf5d0212eb,
  title = {Ferromagnetic and superparamagnetic contamination in pulverized coal},
  author = {F. E. Senftle and A. N. Thorpe and C.C. Alexander and R. B. Finkelman},
  year = {1982},
  doi = {10.1016/0016-2361(82)90297-6},
  url = {https://pubs.usgs.gov/publication/70011840},
  note = {Source identifier: 70011840}
}