Fisher JC (2018). RSurvey: Geographic Information System Application. R package version 0.9.3, https://CRAN.R-project.org/package=RSurvey.

Corresponding BibTeX entry:

  @Manual{,
    title = {{RSurvey}: Geographic Information System Application},
    author = {Jason C. Fisher},
    year = {2018},
    note = {R package version 0.9.3},
    url = {https://CRAN.R-project.org/package=RSurvey},
  }