http://www.loc.gov/mods/v3 http://www.loc.gov/standards/mods/v3/mods-3-2.xsd
Mental retardation: environmental hazards
proceedings of symposia 9, 10 and 11 held at the Middlesex Hospital School on 11 June and 19 November 1971 and 10 March 1972 under the auspices of the Institute for Research into Mental Retardation;cedited [as printed] by Barbara E. Clayton
Institute for Research into Mental Retardation
viii, 112 pages, 2 unnumbered pages, leaf : illustrations ; 22 cm.
Symposium (Institute for Research into Mental Retardation) ; 9-11