@misc{indiciae516c4eca6693,
  title = {Internal standards in fluorescent X-ray spectroscopy},
  author = {I. Adler and J. M. Axelrod},
  year = {1955},
  doi = {10.1016/0371-1951(55)80011-2},
  url = {https://pubs.usgs.gov/publication/70009860},
  note = {Source identifier: 70009860}
}