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
"Vijayan Unni, M. and India. Office of the Registrar General & Census Commissioner","Bilingualism and trilingualism : table C-8, India, states and union territories",,"Controller of Publications, Civil Lines",1999,"Census of India, 1991",,,,https://cir.nii.ac.jp/crid/1130282271863543424