@misc{indiciaed884620bf340,
  title = {Concentration of germanium in the ash of American coals, a progress report},
  author = {Taisia Maximovna Stadnichenko and K. J. Murata and Peter Zubovic and E.L. Hufschmidt},
  year = {1953},
  doi = {10.3133/cir272},
  url = {https://pubs.usgs.gov/publication/cir272},
  note = {Source identifier: cir272}
}