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
"Hoffmann, Richard C. (Richard Charles)","Land, liberties, and lordship in a late medieval countryside : agrarian structures and change in the Duchy of Wrocław",,University of Pennsylvania Press,1989,Middle Ages series,,0812280903,,https://cir.nii.ac.jp/crid/1130000797293496064