@misc{indiciae9921624cdc3f,
  title = {Modification of a carbon-hydrogen-nitrogen analyzer for reduction of instrument background},
  author = {P.R. Klock and P. J. Lamothe},
  year = {1984},
  doi = {10.3133/ofr84489},
  url = {https://pubs.usgs.gov/publication/ofr84489},
  note = {Source identifier: ofr84489}
}