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) SEILACHER A.,Form and function of the stem in a pseudoplanktonic crinoid (Seirocrinus),Palaeontology,,,1968,11,,275-282,https://cir.nii.ac.jp/crid/1570854175034157696,