TY - RPRT TI - The evolutionary development of high specific impulse electric thruster technology AU - Sovey, James S. AU - Hamley, John A. AU - Patterson, Michael J. AU - Rawlin, Vincent K. AU - Myers, Roger M. PY - 1992 UR - https://ntrs.nasa.gov/citations/19920022098 ID - 19920022098 ER -