@misc{indiciaef264af1c2c6c,
  title = {Clear mylar templates used to measure latitude and longitude of sample localities at scales of 1:24,000, 1:62,500, 1:100,000 and 1:250,000 between the latitudes of 25 degrees 30 minutes and 40 degrees north or south latitudes},
  author = {W. L. Campbell and George VanTrump},
  year = {1981},
  doi = {10.3133/ofr81747},
  url = {https://pubs.usgs.gov/publication/ofr81747},
  note = {Source identifier: ofr81747}
}