@misc{indiciaebab58c13a4f0,
  title = {Practical use of the Global Positioning System},
  author = {W.M. Harris and D.W. Bennett},
  year = {1988},
  doi = {10.3133/ofr88103},
  url = {https://pubs.usgs.gov/publication/ofr88103},
  note = {Source identifier: ofr88103}
}