@misc{indiciae5f331bc898e7,
  title = {Line emission from clumpy photodissociation regions},
  author = {Burton, Michael G. and Hollenbach, D. J. and Tielens, A. G. G. M.},
  year = {1990},
  url = {https://ntrs.nasa.gov/citations/19910033873},
  note = {Source identifier: 19910033873}
}