Mode of access: Internet via the NASA Web site. Address as of 7/2/04: http://spacelink.nasa.gov/Instructional.Materials/ NASA.Educational.Products/Exploring.the.Extreme/Ex ploring.the.Extreme.pdf; current access is available via PURL.
General Note:
Title from title screen (viewed on July 2, 2004). Date of issue from prelim. page.