@misc{indiciaebb65103a444c,
  title = {A study of galaxy groups and clusters - The case for a clumpy intergalactic medium.},
  author = {Silk, J. and Tarter, J.},
  year = {1973},
  url = {https://ntrs.nasa.gov/citations/19730052806},
  note = {Source identifier: 19730052806}
}