@misc{indiciae718206e175c8,
  title = {Radiation pattern of a borehole radar antenna},
  author = {K.J. Ellefsen and D.L. Wright},
  year = {2002},
  doi = {10.1117/12.462190},
  url = {https://pubs.usgs.gov/publication/70025065},
  note = {Source identifier: 70025065}
}