J. Down

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Observations on an Ethnic Classification of Idiots

J. Down, 1867 .

Abstracts of the Lettsomian Lectures on Some of the Mental Affections of Childhood and Youth

J. Down, 1887, British medical journal.

Mental Affections of Childhood and Youth

J. Down, 1991 .

Some of the Mental Affections of Childhood and Youth

J. Down, 1887, British medical journal.

Marriages of Consanguinity in relation to Degeneration of Race

J. Down, 1867 .

Lettsomian Lectures on some of the Mental Affections of Childhood and Youth

J. Down, 1887 .

Observations on an ethnic classification of idiots. 1866.

J. Down, 1995, Mental retardation.