- Bicket, Nadine A.; and Gary, Gilmer A.:
Celestial Coordinate Transformations.
NASA Technical Memorandum 53943, September, 1969
Where is M13? from Think Astronomy
Equatorial to Galactic conversion tool
Universal coordinate converter
- 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!