@misc{indiciaea6886b42aacb,
  title = {The HEAO-A Scanning Modulation Collimator instrument},
  author = {Roy, A. and Ballas, J. and Jagoda, N. and Mckinnon, P. and Ramsey, A. and Wester, E.},
  year = {1977},
  url = {https://ntrs.nasa.gov/citations/19770041757},
  note = {Source identifier: 19770041757}
}