@article{556,
  author = {K. Johnson and H. Kobulnicky and P. Massey and Peter Conti},
  title = {A Sample of Clusters of Extragalactic Ultracompact H II Regions},
  year = {2001},
  journal = {The Astrophysical Journal},
  volume = {559},
  pages = {864-877},
  month = {Jan-10-2001},
  issn = {0004-637X},
  doi = {10.1086/322335},
}