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) MATSUMOTO T.,"On three Cretaceous Keeled ammonites from the Urakawa area, Hokkaido.",Sci. Rept. Yokosuka City Mus.,,,1982,,29,9-22,https://cir.nii.ac.jp/crid/1573668923874587776,