@misc{indiciae68060db9f8f3,
  title = {Clear mylar templates used to measure latitude and longitude of sample localities at scales of 1:63,360 and 1:250,000 between the latitudes of 49 degrees and 71 degrees 30 minutes north or south},
  author = {W. L. Campbell and George VanTrump},
  year = {1982},
  doi = {10.3133/ofr82724},
  url = {https://pubs.usgs.gov/publication/ofr82724},
  note = {Source identifier: ofr82724}
}