@misc{indiciae44818f241ca0,
  title = {Aeromagnetic map of the Seven Valleys quadrangle and part of the Lineboro quadrangle, York County, Pennsylvania},
  author = {Randolph Wilson Bromery and N. C. Natoff and and others},
  year = {1961},
  doi = {10.3133/gp287},
  url = {https://pubs.usgs.gov/publication/gp287},
  note = {Source identifier: gp287}
}