@misc{indiciae63747ccbc80c,
  title = {Regionalization in geology by multivariate classification},
  author = {Jan Harff and J.C. Davis},
  year = {1990},
  doi = {10.1007/bf00890505},
  url = {https://pubs.usgs.gov/publication/70016256},
  note = {Source identifier: 70016256}
}