Distributed to depository libraries in microfiche.
"Supported by NASA Marshall Space Flight Center, grant no. NAG-8-755"--Page i.
Form
Mode of access via the NTRS web site. Address as of 4/19/06: http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/19900012464%5F1990012464.pdf; current access is available via PURL.