@article{6329,
  author = {Roy Garstang},
  title = {The errors of an equatorial sundial},
  year = {1997},
  journal = {The Observatory},
  volume = {117},
  pages = {344-351},
  month = {12/1997},
  url = {http://adsabs.harvard.edu/full/1997Obs...117..344G},
  note = {JILA Pub. 5905},
}