@misc{indiciae76db641e910d,
  title = {Instrumental improvements in altimetry},
  author = {James Lloyd Buckmaster and Atherton Hagy Mears},
  year = {1958},
  doi = {10.3133/cir405},
  url = {https://pubs.usgs.gov/publication/cir405},
  note = {Source identifier: cir405}
}