@misc{indiciae0fda939d8d90,
  title = {An age difficulty in separating spatially contiguous data.},
  author = {H M CLAY},
  year = {1956},
  doi = {10.1093/geronj/11.3.318},
  url = {https://pubmed.ncbi.nlm.nih.gov/13332227/},
  note = {Source identifier: 13332227}
}