@misc{indiciae501e8fec9ccb,
  title = {Presidential elections, 1972-1984; Presidential elections, 1789-1968},
  author = {Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey},
  year = {1987},
  doi = {10.3133/32550},
  url = {https://pubs.usgs.gov/publication/32550},
  note = {Source identifier: 32550}
}