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 Drewry Shipping Consultants,Trends in Japanese dry bulk shipping and trade,,H.P. Drewry (Shipping Consultants),1978,An Economic study,,,,https://cir.nii.ac.jp/crid/1130000794037822464