The occurrence of erythroblastosis fetalis in American Negroes.
D001741:Black or African American; D044383:Black People; D004899:Erythroblastosis, Fetal; D006402:Hematologic Diseases; D006801:Humans; D012204:Rh-Hr Blood-Group System; D014481:United States
D012204:Rh-Hr Blood-Group System
ERYTHROBLASTOSIS, FETAL; NEGROES; Rh FACTOR