@misc{indiciae1eef733fed9a,
  title = {Topography and topographers: Yesterday, to-day to-morrow: Fiftieth anniversary},
  author = {E.I. Ireland and Gerald Fitzgerald},
  year = {1929},
  doi = {10.3133/70216527},
  url = {https://pubs.usgs.gov/publication/70216527},
  note = {Source identifier: 70216527}
}