title: The frequency of the Wr-a, By and Mg blood group antigens in blood donors in the south of England.
mesh_terms: D001782:Blood Donors; D001789:Blood Group Antigens; D001803:Blood Transfusion; D004739:England; D006801:Humans
chemical_list: D001789:Blood Group Antigens
keywords: BLOOD GROUPS; BLOOD TRANSFUSION