@misc{indiciae3fd8644e716f,
  title = {Building on a legacy: 125 years of USGS topographic map},
  author = {J. Campbell and M.R. Newell and D.A. Perdue},
  year = {2010},
  url = {https://pubs.usgs.gov/publication/70034608},
  note = {Source identifier: 70034608}
}