@misc{indiciae888635875e14,
  title = {High energy from space},
  author = {Margon, Bruce and Canizares, Claude and Catura, Richard C. and Clark, George W. and Fichtel, Carl E. and Friedman, Herbert and Giacconi, Riccardo and Grindlay, Jonathan E. and Helfand, David J. and Holt, Stephen S.},
  year = {1991},
  url = {https://ntrs.nasa.gov/citations/19910023709},
  note = {Source identifier: 19910023709}
}