@misc{indiciaeff7fb76e3aa4,
  title = {How to order maps on microfilm},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1981},
  doi = {10.3133/70039232},
  url = {https://pubs.usgs.gov/publication/70039232},
  note = {Source identifier: 70039232}
}