Author,Title,Edition,Publisher,Year,Series,Number,ISBN,ISSN,URL
"Thrupp, Sylvia L. (Sylvia Lettice)","The merchant class of medieval London, 1300-1500 : with a new introduction",,University of Michigan Press,1989,Ann Arbor paperbacks,,"0472060724,0472090720",,https://cir.nii.ac.jp/crid/1130282272532392704