@misc{indiciaea9cf12327621,
  title = {The modulation collimator in X-ray astronomy.},
  author = {Bradt, H. and Garmire, G. and Gorenstein, P. and Gursky, H. and Oda, M. and Spada, G. and Sreekantan, B. V.},
  year = {1968},
  url = {https://ntrs.nasa.gov/citations/19680063335},
  note = {Source identifier: 19680063335}
}