@misc{indiciaef86ec6f3d934,
  title = {TOPOLOGICAL STRUCTURING OF RASTER-SCANNED LINE MAP DATA.},
  author = {Robin G. Fegeas and Richard A. Pearsall},
  year = {1984},
  url = {https://pubs.usgs.gov/publication/70013912},
  note = {Source identifier: 70013912}
}