@misc{indiciae403bf4c084e7,
  title = {Procedures and best practices for trigonometric leveling in the U.S. Geological Survey},
  author = {Michael L. Noll and Paul H. Rydlund},
  year = {2020},
  doi = {10.3133/tm11d3},
  url = {https://pubs.usgs.gov/publication/tm11D3},
  note = {Source identifier: tm11D3}
}