1. Anderson, J. R. and Work, G. A. "The capabilities of microthrust electric propulsion/' presented at the AIAA Propulsion Joint Specialist Conference, Colorado Springs (1965); not preprinted.
2. Eilenberg, S. L., Caplinger, E., and Worlock, R. M. "Applications and characteristics of ion thrusters in the micro to millipound range/' AIAA Paper 66-212 (1966).