References, Resources, and Permissions:
All sources used for the creation of this site are listed below. The Essence of Time attempts to ensure that all entries are correct, but if you notice an entry displayed incorrectly, report it to us here.
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Printed Material (Entire Book)
Clifton, Daniel. Chronicle of the 20th century. Liberty, MO USA: JL International Publishers, 1994
Felder, Doborah G. A century of women: the most influential events in the twentieth-century women's history. Secaucus, NJ USA: Carol Publisher Group, 1998
Galt, Thomas. Seven Days from Sunday. New York: Crowell, 1956
Asimov, Isaac. The clock we live on. London; New York: Abelard-Schuman, 1965
Hawkins, Stephen W. A brief history of time. Toronto; New York: Bantam Books, 1988
Trefil, James S. Space, time, infinity. Washington, DC: Smithsonian Books, 1985
Calder, Nigel Einstein's Universe. London: Penguin Group, 1979
Pickover, A. Clifford Time: A Traveler's Guide. Oxford: Oxford University Press, 1998
Davies, Paul. About Time. New York: Simon & Schuster, 1995
Gilbert, Martin A History of the Twentieth Century 1900-1933, 1934-1966, 1967-1997. New York: Avon Books, 1997Electronic Resources
"Ancient Calendars" <http://physics.nist.gov/GenInt/Time/ancient.html> (7/13/99)
"Earliest Clocks" <http://physics.nist.gov/GenInt/Time/early.html> (7/13/99)
"Revolution in Timekeeping" <http://physics.nist.gov/GenInt/Time/revol.html> (7/13/99)
""Atomic Age" of Time Standards" <http://physics.nist.gov/GenInt/Time/atomic.html> (7/13/99)
"Measuring Time" <http://www.worldbook.com/fun/calendars/htm/measuring.htm> (7/13/99)
"Ancient Calendars" <http://physics.nist.gov/GenInt/Time/ancient.html> (4/19/99)
"Center for Millennium Studies" <http://www.mille.org> (7/13/99)
Brown, Tod. <Tbrown@uls.pvt.k12.mi.us> "Re: Question" May, 1999. Personal Email.Permissions
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