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 Gallaudet College. Office of Demographic Studies,Characteristics of hearing impaired students under six years of age : United States: 1969-70,,"Office of Demographic Studies, Gallaudet College",1972,Annual survey of hearing impaired children and youth,,,,https://cir.nii.ac.jp/crid/1130000797306641024