After being out of print for many years, the Explanatory Supplement was re-written and re-published in 1992. It is now the Explanatory Supplement to the Astronomical Almanac, edited by Kenneth Seidelmann and is published by University Science Books, 20 Edgehill Rd, Mill Valley, CA 94941.
- Explanatory Supplement Richard M. Koolish
- Re: Explanatory Supplement Luke Coletti
