@article{9022,
  author = {Roy Garstang},
  title = {Predictions of seasonal variations in night sky brightnesses},
  year = {1988},
  journal = {The Observatory},
  volume = {108},
  pages = {159-161},
  month = {10/1988},
  url = {http://adsabs.harvard.edu/full/1988Obs...108..159G},
  note = {JILA Pub. 3866},
}