@misc{indiciae4257a363e382,
  title = {The analysis of silicate and carbonate rocks a revision of Bulletin 305},
  author = {W. F. Hillebrand},
  year = {1910},
  doi = {10.3133/b422},
  url = {https://pubs.usgs.gov/publication/b422},
  note = {Source identifier: b422}
}