The global positioning system [electronic resource].
- Washington, D.C. : National Academy of Sciences, c1996.
- 8 p.
"This article was adapted by Gary Taubes from an article written by Daniel Kleppner for Beyond Discovery: the Path from Research to Human Benefit"--P. 8.
Electronic reproduction. Palo Alto, Calif. : ebrary, 2009. Available via World Wide Web. Access may be limited to ebrary affiliated libraries.
Global Positioning System. Artificial satellites in navigation.