@misc{indiciae1241f9bf1cda,
  title = {Technology Area Roadmap for In Space Propulsion Technologies},
  author = {Johnson, Les and Meyer, Michael and Palaszewski, Bryan and Coote, David and Goebel, Dan and White, Harold},
  year = {2011},
  url = {https://ntrs.nasa.gov/citations/20120016676},
  note = {Source identifier: 20120016676}
}