A clinical study of the Rh factor.
D035843:Biomedical Research; D001699:Biometry; D004899:Erythroblastosis, Fetal / Q000706:statistics & numerical data*; D012204:Rh-Hr Blood-Group System
D012204:Rh-Hr Blood-Group System
ERYTHROBLASTOSIS, FETAL/statistics; RH FACTORS