@misc{indiciaea1255fac7c60,
  title = {Radiation pattern of a borehole radar antenna},
  author = {K.J. Ellefsen and D.L. Wright},
  year = {2005},
  doi = {10.1190/1.1852779},
  url = {https://pubs.usgs.gov/publication/70029164},
  note = {Source identifier: 70029164}
}