@misc{indiciae69d3b398004b, title = {Electric Propulsion Orbital Platform}, author = {V. J. Friedly and Wilhelmus M. Ruyten and R. J. Litchford and G. W. Garrison}, year = {1993}, url = {https://ntrs.nasa.gov/citations/19960009788}, note = {Source identifier: 19960009788} }