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Switzer J, Chamberlain S, Marsh L, Wong K, Scott E (2025). “rnpn: Interface to the National 'Phenology' Network 'API'.” doi:10.32614/CRAN.package.rnpn, http://usa-npn.github.io/rnpn/.

Corresponding BibTeX entry: 

  @Misc{switzer_etall:2025,
    title = {rnpn: Interface to the National 'Phenology' Network
      'API'},
    author = {Jeff Switzer and Scott Chamberlain and Lee Marsh and
      Kevin Wong and Eric R Scott},
    year = {2025},
    doi = {10.32614/CRAN.package.rnpn},
    url = {http://usa-npn.github.io/rnpn/},
    abstract = {Programmatic interface to the Web Service methods
      provided by the National 'Phenology' Network
      (<https://usanpn.org/>), which includes data on various life
      history events that occur at specific times.},
    keywords =
      {data,national-phenology-network,phenology,r,r-package,rstats,species,web-api},
    version = {1.3.0},
  }

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