Language achievements of mentally retarded children
Subtitle: final report.
By: Project directors:  Donald D. Durrell [and] Helen B. Sullivan.
Contributors: Durrell, Donald DeWitt, 1903-; Sullivan, Helen Blair.
Published: 1958
Place of publication: Boston
Language: eng
Number of pages: 34
Subjects: Children with mental disabilities -- Education.
Notes: "Office of Education contract no. 6402."