Mental subnormality in the community
Subtitle: a clinical and epidemiologic study [by] Herbert G. Birch [and others]
Contributors: Birch, Herbert George, 1918-
Publisher: Williams & Wilkins Co.
Published: 1970
Place of publication: Baltimore
Language: eng
Number of pages: 200
Subjects: Mental retardation -- United States -- Statistics; Children with mental disabilities -- United States -- Statistics