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) Peter G. Ryan,The incidence and characteristics of plastic particles ingested by seabirds,Marine Environmental Research,0141-1136,Elsevier BV,1987-01,23,3,175-206,https://cir.nii.ac.jp/crid/1362825893464069120,https://doi.org/10.1016/0141-1136(87)90028-6