TY - RPRT TI - An N-body low-thrust trajectory parameter optimization program, volume 3 Final report AU - Hipkins, C. AU - Horsewood, J. L. AU - Lefton, L. AU - Pines, S. AU - Wolf, H. PY - 1971 UR - https://ntrs.nasa.gov/citations/19710021822 ID - 19710021822 ER -