@misc{indiciaefbfdb8b3fff6,
  title = {Preliminary testing of a prototype portable X-ray fluorescence spectrometer},
  author = {Patten, L. L. and Anderson, N. B. and Stevenson, J. J.},
  year = {1982},
  url = {https://ntrs.nasa.gov/citations/19830014310},
  note = {Source identifier: 19830014310}
}