@misc{indiciae2050e83aa939,
  title = {Triangulation and primary traverse, 1916-1918. Triangulation and primary traverse in Delaware, Maryland, and West Virginia, 1916-1918},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1923},
  doi = {10.3133/b709a},
  url = {https://pubs.usgs.gov/publication/b709A},
  note = {Source identifier: b709A}
}