@misc{indiciae88f31efa9109,
  title = {Triangulation and primary traverse, 1913-1915; Triangulation and primary traverse in Virginia and West Virginia, 1913-1915},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1916},
  doi = {10.3133/b644r},
  url = {https://pubs.usgs.gov/publication/b644R},
  note = {Source identifier: b644R}
}