@misc{indiciaecf9db33e54a1,
  title = {SOFIA: A Stratospheric Observatory for Infrared Astronomy},
  author = {Erickson, E. F. and Davidson, J. A. and Thorley, G. and Caroff, L. J.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910023719},
  note = {Source identifier: 19910023719}
}