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Keywords: Stereogram (three-dimensional population pyramid) modeled on actual data (Swedish census, 1750-1875).jpg fr Stéréogramme représentation en trois dimensions de la pyramide des âges à partir des données du recensement suédois 1750-1875 par Luigi Perozzo 2013-11-09 11 13 58 http //math yorku ca/SCS/Gallery/images/stereo2 jpg Luigi Perozzo 1856-1916 PD-Art PD-old-auto Uploaded with UploadWizard Data visualization Luigi Perozzo Demographics of Sweden |