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 Hugo's Language Institute,"Italian conversation simplified : practical sentences, introducing all the important idioms, with a varied selection of commercial phrases, including some useful hints for writing business letters",,Hugo's Language Institute,,Hugo's simplified system,,,,https://cir.nii.ac.jp/crid/1130000794816803584