Description
Item Description:Title from title screen (viewed Feb. 3, 2009).
Electronic resource.
Physical Description:15 pages : digital, PDF file.
Format:Mode of access: Internet from the NTRS web site. Address as of 2/3/09: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19890018659%5F1989018659.pdf ; current access is available via PURL.