@misc{indiciaefec3d6fa6b91,
  title = {Diffuse and dark clouds in the interstellar medium},
  author = {De Boer, Klaas S. and Jura, Michael A. and Shull, J. Michael},
  year = {1987},
  url = {https://ntrs.nasa.gov/citations/19880035420},
  note = {Source identifier: 19880035420}
}