言語遅滞児の1歳6カ月児健康診査における早期発見-早期ケアの試み II 1歳半健診から3歳健診までの3年間の疫学的追跡研究
Early diagnosis and early care of delayed speech in one and half-year-old children’s examination. 〔II〕. Epidemiological follow-up study during the past three years from 18-to 36-month-old children’s examination.