@misc{indiciae7da1183436b5,
  title = {Topographic instructions of the United States Geological Survey. Topographic mapping},
  author = {W.M. Beaman},
  year = {1928},
  doi = {10.3133/b788e},
  url = {https://pubs.usgs.gov/publication/b788E},
  note = {Source identifier: b788E}
}