1.

Technical Paper

Technical Paper
Churchill, Susanne ; Pollock, David M. ; Natale, Mary Ellen ; Moore-Ede, Martin C.
Pub. info.: NASA Technical Reports.  (NASA-CR-163355),  pp.1-30,  1987.  National Aeronautics and Space Adminstration
2.

Technical Paper

Technical Paper
Churchill, Susanne
Pub. info.: NASA Technical Reports.  (NASA-CR-177548),  pp.1-93,  1990.  National Aeronautics and Space Adminstration