@misc{indiciae3fbdc70d67c8,
  title = {Propulsion Technology Assessment: Science and Enabling Technologies to Explore the Interstellar Medium},
  author = {Hopkins, Randall C. and Thomas, Herbert D. and Wiegmann, Bruce M. and Heaton, Andrew F. and Johnson, Les and Beers, Benjamin R.},
  year = {2015},
  url = {https://ntrs.nasa.gov/citations/20150021433},
  note = {Source identifier: 20150021433}
}