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Bigler, Adrien; Ertz, Olivier; Rappo, Daniel; Composto, Sarah; Joerin, Florent; and Risse, Maude Luggen
"GEOPOLL - Integrate Cartographic Questions in Web Forms, Polls or Surveys,"
Free and Open Source Software for Geospatial (FOSS4G) Conference Proceedings: Vol. 17
, Article 9.
Available at: https://scholarworks.umass.edu/foss4g/vol17/iss1/9