@misc{indiciae97f753c9f18b,
  title = {Ultraviolet extinction differences within NGC 6530},
  author = {Boggs, Don and Bohm-Vitense, Erika},
  year = {1989},
  url = {https://ntrs.nasa.gov/citations/19890048872},
  note = {Source identifier: 19890048872}
}