@misc{indiciae1eb28a655b95,
  title = {Chemical Evolution of Protostellar Matter},
  author = {Whittet, D. and Velusamy, T. and Tielens, A. and Blake, G. and Bergin, E. and van Dishoeck, E.},
  year = {1999},
  url = {https://ntrs.nasa.gov/citations/20210003738},
  note = {Source identifier: 20210003738}
}