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
"Dhruva, N. M. (Nagardas Mulji)",Gujarati self-taught by the natural method with phonetic pronunciation (Thimm's system),,E. Marlborough,1920,Marlborough's self-taught series,,,,https://cir.nii.ac.jp/crid/1130282271360779392