The Baltimore Rh Typing Laboratory; a new community public health service.
D015142:Baltimore; D001789:Blood Group Antigens; D006801:Humans; D007753:Laboratories; D012111:Residence Characteristics; D012204:Rh-Hr Blood-Group System; D014481:United States; D014492:United States Public Health Service
D001789:Blood Group Antigens; D012204:Rh-Hr Blood-Group System
BLOOD/groups--Rh factor; LABORATORIES, RH TYPING