@misc{indiciaebaee4da41abb,
  title = {Map showing surficial and generalized bedrock geology and accompanying side-looking airborne radar image of the Radford 30' x 60' Quadrangle, Virginia and West Virginia},
  author = {Art Schultz and M. J. Bartholomew and S.E. Lewis},
  year = {1991},
  doi = {10.3133/i2170a},
  url = {https://pubs.usgs.gov/publication/i2170A},
  note = {Source identifier: i2170A}
}