@misc{indiciae309f1e173272,
  title = {Determination of elements in National Bureau of Standards' geological reference materials SRM 278 obsidian and SRM 688 basalt by inductively coupled argon plasma-atomic emission spectrometry},
  author = {J.G. Crock and F.E. Lichte and Paul H. Briggs},
  year = {2007},
  doi = {10.1111/j.1751-908x.1983.tb00395.x},
  url = {https://pubs.usgs.gov/publication/70011412},
  note = {Source identifier: 70011412}
}