1. Image of astronaut on the moon from Claris Works libraries.
Electronic
Sources
Text or Multimedia from Web Pages, FTP sites, Telnet
1. Goodfellow, Stephen "Can Gravity be Induced?" 1979 (updated 1994).
2. Andrews Radar Studios, "Physics for Kids" 1997 - 2000.
3. Engineers from Standard University, "What is gravity probe B?"
4. NASA home page, "A Brief History of Rocketry," Updated 1995.
Printed
Materials
Part of a book
1. Farndon, John. "Gravity." Children's Encyclopedia. Diamond Books, 1992, p. 156.
Printed
Materials
Entire book
1. Schomp, Virginia. If You Were An... Astronaut. New York: Benchmark Books,1998.
2. Long, Kim. The Astronaut Training Book for Kids. United States:Lodestar Books, 1990.
3. Barrett, N.S. Astronauts. New York: Franklin Watts Ltd., 1985.
4. Greene, Carol. Astronauts Work in Space. The Child's World, Inc. 1998.
5. Cole, Joanna. Magic Schoolbus Lost in the Solar System. Scholastic, Inc. 1990.