On some of the mental affections of childhood and youth : being the Lettsomian lectures delivered before the Medical Society of London in 1887, together with other papers / by J. Langdon Down.

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Mental Retardation - in adolescence

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On some of the mental affections of childhood and youth : being the Lettsomian lectures delivered before the Medical Society of London in 1887, together with other papers / by J. Langdon Down.