@misc{indiciae83b69ded76fb,
  title = {Triangulation and primary traverse, 1916-1918. Primary traverse in Michigan, 1916-1917},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1923},
  doi = {10.3133/b709f},
  url = {https://pubs.usgs.gov/publication/b709F},
  note = {Source identifier: b709F}
}