@misc{indiciaeff188df75e07,
  title = {A practical primer on geostatistics},
  author = {Ricardo A. Olea},
  year = {2018},
  doi = {10.3133/ofr20091103},
  url = {https://pubs.usgs.gov/publication/ofr20091103},
  note = {Source identifier: ofr20091103}
}