@misc{indiciaeff3db7d8ffe3,
  title = {A computer program for mapping satellite-borne narrow-beam antenna footprints on earth},
  author = {Stagl, T. W. and Singh, J. P.},
  year = {1972},
  url = {https://ntrs.nasa.gov/citations/19730003422},
  note = {Source identifier: 19730003422}
}