@misc{indiciaec5868b554020,
  title = {An X-ray diffraction method for semiquantitative mineralogical analysis of Chilean nitrate ore},
  author = {J.C. Jackson and G.E. Ericksent},
  year = {1997},
  url = {https://pubs.usgs.gov/publication/70019104},
  note = {Source identifier: 70019104}
}