@misc{indiciae46e0b1025b5e,
  title = {Providing access to the 1990 U.S. census maps.},
  author = {J Weintrop},
  doi = {10.1016/1352-0237(95)00009-r},
  url = {https://pubmed.ncbi.nlm.nih.gov/12291626/},
  note = {Source identifier: 12291626}
}