Ibrahim, M E Surface ultrastructure of the human placental villi and sites of contact with maternal red blood cells. [electronic resource] - Archives of gynecology 1982 - 67-72 p. digital Publication Type: Journal Article ISSN: 0170-9925 Standard No.: 10.1007/BF02110681 doi Subjects--Topical Terms: Chorionic Villi--ultrastructureErythrocytes--ultrastructureFemaleHumansMaternal-Fetal ExchangeMicroscopy, ElectronPlacenta--ultrastructurePregnancy