@article{257,
  author = {Roy Garstang},
  title = {Limiting visual magnitude and night sky brightness},
  year = {2000},
  journal = {Memorie della Society a Astronomia Italiana},
  volume = {71},
  pages = {83},
  month = {2000-10},
  url = {http://adsabs.harvard.edu/full/2000MmSAI..71...83G},
  note = {JILA Pub. 6150},
}