Simson, I W Membranous obstruction of the inferior vena cava. [electronic resource] - South African medical journal = Suid-Afrikaanse tydskrif vir geneeskunde May 1986 - 601 p. digital Publication Type: Letter ISSN: 0256-9574 Subjects--Topical Terms: HumansVascular DiseasesVena Cava, Inferior