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)
WARD J. H.,Hierarchical grouping to optimize an objective function,J. Am. Stat. Assoc.,,,1963,58,,236-244,https://cir.nii.ac.jp/crid/1570572699307728512,