Site References

Web Sites

Doggett, L.E. "Calendars".
2 Apr. 2003 <http://astro.nmsu.edu/~lhuber/leaphist.html>.

"Ancient Calendars".
2 Apr. 2003 <http://physics.nist.gov/GenInt/Time/ancient.html>.

Weisstein, Eric W. "Calendar".
2 Apr. 2003 <http://scienceworld.wolfram.com/astronomy/Calendar.html>.

"Calendars from the Sky".
2 Apr. 2003 <http://webexhibits.org/calendars/calendar.html>.

"History of the Calendar." Infoplease.com.
© 2002 Family Education Network.
2 Apr. 2003 <http://www.infoplease.com/ipa/A0002061.html>.

"Planetary Fact Sheets."
2 Apr. 2003 <http://nssdc.gsfc.nasa.gov/planetary/planetfact.html>.

"Database Normalization And Design Techniques"
20 Mar. 2003  www.phpbuilder.com/columns/barry20000731.php3

Books

Practical Issues in Database Management   Fabian Pascal, Addison-Wesley, 2000, ISBN 0-201-48555-9.

Database Design for Mere Mortals   Michael Hermandez, Addison-Wesley, 1997, ISBN 0-201-69471-9.

Permissions

Image used in 'Calsoft' logo at <http://submit.thinkquest.org/TQ0313238/index.php> from A Walk Through Time at <http://physics.nist.gov/GenInt/Time/time.html>, NIST Physics Labrotory, April 2003.

'Readers should note that, because this is a publication of the National Institute of Standards and Technology, the text and images in this short treatise are not subject to copyright, and may be reproduced and used without consideration for copyright regulations. However, it would be appreciated if users acknowledged this web site as a source of information.' (found at <http://physics.nist.gov/GenInt/Time/verhist.html>)

Images used across the top of each page, at <http://submit.thinkquest.org/TQ0313238/index.php> from Aztec Calendar at <http://www.azteccalendar.com>, René Voorburg, April 2003.

'This material is © 1995-1990 by René Voorburg and William Horden to the extent that it is original material. However, full rights are granted to any nonprofit use.' (found at <http://www.azteccalendar.com/credits.html>)