著者名,書名,版表示,出版者名,出版年,シリーズ名,番号,ISBN,ISSN,URL "Higgins, Philip J.",Notes on categories and groupoids,,Van Nostrand Reinhold,1971,Van Nostrand Reinhold mathematical studies,,0442034067,,https://cir.nii.ac.jp/crid/1130000794442869120