@misc{indiciae4281df08e8a2,
  title = {A nondispersive X-ray spectrometer for lunar and planetary geochemical analysis.},
  author = {Metzger, A. E. and Parker, R. E. and Trombka, J. I.},
  year = {1966},
  url = {https://ntrs.nasa.gov/citations/19660044404},
  note = {Source identifier: 19660044404}
}