616.8588
Ass
M
Association for Research in Hervous and
Mental Disease
Mental retardation; proceedings of the
association, December 11 and 12, 1959. New
York, N. Y. Baltimore, Williams & Wilkins,
1962.
xii, 331 p. ilus., 28 tablas, 24 cm.
(Its Research publication, v. 39)
Bibliografía al final de los capítulos.