[On the secretion of Ahel substance in human urine].
D000017:ABO Blood-Group System / Q000652:urine*; D001789:Blood Group Antigens; D006801:Humans; D012463:Saliva / Q000032:analysis
D000017:ABO Blood-Group System; D001789:Blood Group Antigens
Uber die Ausscheidung der Ahel-Substanz im menschlichen Harn.