2.
Spaceflight Mechanics 1995
by Proulx, Ronald J., Liu, Jos...
ISBN: 9780877034018
List Price: $280.00
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AAS/AIAA Astrodynamics Conference, Aug. 12-15, 1985, Vail, CO
by Kaufman, Bernard, Liu, Jose...
ISBN: 9780877032465
List Price: $110.00