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) BURTON GJ,Maternal arterial connections to the placental intervillous space during the first trimester of human pregnancy : the Boyd collection revisited,Am J Obstet Gynecol.,,,1999,181,3,718-724,https://cir.nii.ac.jp/crid/1572261550660768896,