title: Placental permeability for the beta isoantibodies in relation to the maternal A1-A2 subgroups. Preliminary report.
mesh_terms: D001789:Blood Group Antigens; D005260:Female; D006801:Humans; D007518:Isoantibodies; D010539:Permeability; D010920:Placenta / Q000502:physiology*; D011247:Pregnancy / Q000097:blood
chemical_list: D001789:Blood Group Antigens; D007518:Isoantibodies
keywords: BLOOD GROUPS; PLACENTA/physiology; PREGNANCY/blood