著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI)
JENKS G. F.,Optimal Data Classification for Choropleth Maps,"Department of Geographiy, University of Kansas Occasional Paper",,,1977,,,,https://cir.nii.ac.jp/crid/1570572700325134464,