@misc{indiciae613e86a32f11,
  title = {Sub-millimeter wave frequency heterodyne detector system},
  author = {Siegel, Peter H. and Dengler, Robert and Mueller, Eric R.},
  year = {2009},
  url = {https://ntrs.nasa.gov/citations/20090043100},
  note = {Source identifier: 20090043100}
}