Unclassified control No. 015415.; Requested by D.L. Christensen, DLC-5/2/69-Memo for Scientific and Technical Information, Cameron Station, Alexandria.
Cover has: P. D. Castenholz and H. K. Griggs, Advanced Systems, Advanced Projects Department. D. W. Hege, Manager, Advanced Projects. Paper regarding the importance of propulsion technology and the future missions that would require advancements in that field.