@conference{4819,
  author = {J. Shull},
  title = {Theoretical problems in the interstellar medium},
  year = {1991},
  publisher = {IAU},
  address = {Buenos Aires},
  isbn = {ISBN-10: 079231915X ISBN-13: 978-0792319153},
  url = {https://books.google.com/books?hl=en\&lr=\&id=HAYaCQAAQBAJ\&oi=fnd\&pg=PA108\&dq=related:58lL7Ta0WucJ:scholar.google.com/\&ots=um-T3M1VQV\&sig=AZy25D3ymZnVj5_WMP0hvGl5YPM$\#$v=onepage\&q\&f=false},
  note = {JILA Pub. 4633},
}