TY - BOOK AU - Penrose L. S., Smith G. F., Down J. Langdon TI - Down's Anomaly U1 - WM300 PY - 1966/// CY - London PB - J. and A. Churchill KW - Mental Retardation KW - Down Syndrome N1 - Originally authored by: J. Langdon Down N2 - Down Syndrome, Mental Retardation ER -