@misc{indiciaef3425e351526,
  title = {Nondispersive X-ray emission analysis for geochemical exploration},
  author = {Adler, I. and Lamothe, R. and Schmadebeck, R. and Trombka, J. I.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19690000011},
  note = {Source identifier: 19690000011}
}