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 "Unger, Richard W.","Ships and shipping in the North Sea and Atlantic, 1400-1800",,Ashgate,1997,Collected studies series,,0860786609,,https://cir.nii.ac.jp/crid/1130282270014535424