@misc{indiciaec7cad8104a2e,
  title = {The X-ray superbubble in Cygnus},
  author = {Cash, W. and Charles, P. and Bowyer, S. and Walter, F. and Garmire, G. and Riegler, G.},
  year = {1980},
  url = {https://ntrs.nasa.gov/citations/19800060821},
  note = {Source identifier: 19800060821}
}