@misc{indiciae55d8dfe39db1,
  title = {Electric propulsion research and development at JPL},
  author = {Goebel, Dan M. and Katz, Ira and Ziemer, J. and Brophy, J. R. and Polk, J. E. and Johnson, L.},
  year = {2005},
  url = {https://ntrs.nasa.gov/citations/20060043458},
  note = {Source identifier: 20060043458}
}