@misc{indiciae8d91933bb78f,
  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 = {2012},
  url = {https://ntrs.nasa.gov/citations/20120015032},
  note = {Source identifier: 20120015032}
}