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
"Ricketts, Philadelphia","High-ranking widows in medieval Iceland and Yorkshire : property, power, marriage and identity in the twelfth and thirteenth centuries",,Brill,2010,"The northern world : North Europe and the Baltic c. 400-1700 A.D. : peoples, economies and cultures",,9789004184718,,https://cir.nii.ac.jp/crid/1130000794358323328