著者名,論文名,雑誌名,ISSN,出版者名,出版日付,巻,号,ページ,URL,URL(DOI) Tsuda T,"Studies on the herd immunity of schoolchildren against diphtheria,2",Yokohama medical bulletin,00440531,Yokohama : Yokohama City University School of Medicine,1963-06,14,4,????,https://cir.nii.ac.jp/crid/1520009407519292672,