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
,"German simplified : an easy and rapid self-instructor : grammar, exercises and vocabularies, with the pronunciation exactly imitated ; Key to the ""standard"" edition of German rammar simplified","""Standard"" ed., rev. and entirely re-written",,,Hugo's simplified system,,,,https://cir.nii.ac.jp/crid/1130282273318257280