@misc{indiciaed90f601d3ab3,
  title = {Subsurface discontinuity detection by microwave radiometry.},
  author = {Hruby, R. J. and Edgerton, A. T.},
  year = {1971},
  url = {https://ntrs.nasa.gov/citations/19720028126},
  note = {Source identifier: 19720028126}
}