Description
Item Description:Title from title screen (viewed Jan. 15, 2009).
Electronic resource.
Physical Description:27 pages : digital, PDF file.
Format:Mode of access: Internet from the NTRS web site. Address as of 1/15/09: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19890017541%5F1989017541.pdf ; current access is available via PURL.