@misc{indiciae4cbe1884ed52,
  title = {Aeromagnetic map of the Reading quadrangle, Berks County, Pennsylvania},
  author = {Randolph Wilson Bromery and J. R. Henderson and G. L. Zandle},
  year = {1960},
  doi = {10.3133/gp230},
  url = {https://pubs.usgs.gov/publication/gp230},
  note = {Source identifier: gp230}
}