@misc{indiciaedffe34b2f7c4,
  title = {Dual purpose optical instrument capable of simultaneously acting as spectrometer and diffractometer},
  author = {Dasgupta, K. and Schnopper, H. W. and Metzger, A. E.},
  year = {1969},
  url = {https://ntrs.nasa.gov/citations/19730019759},
  note = {Source identifier: 19730019759}
}