References for the Celestial Coordinates Program

1. Bicket, Nadine A.; and Gary, Gilmer A.: Celestial Coordinate Transformations. NASA Technical Memorandum 53943, September, 1969
2. Where is M13? from Think Astronomy
3. Equatorial to Galactic conversion tool
4. Universal coordinate converter
5. Clemence, Gerald M.; and Wollard, Edgar W.: Spherical Astronomy, Academic Press, New York and London, 1966.

Web searches for "Celestial Coordinates" will turn up a number of interesting web sites relating to this subject. Today (27 Feb 2013), there are 2,850,000 results. And when you come back a month later and search again, you get new web pages!