H, A, and B titres in South African blood donors.
D000017:ABO Blood-Group System / Q000032:analysis*; D000353:Africa, Southern; D001782:Blood Donors; D004912:Erythrocytes / Q000276:immunology*; D005260:Female; D006801:Humans; D008297:Male; D044465:White People
D000017:ABO Blood-Group System