TY  - BOOK
ED  - United States. Department of Health, Education, and Welfare. Public Health Service
TI  - Intellectual Maturity of Children. United States: : Demographic and Socioeconomic Factors
T2  - Vital and Health Statistics.Series 11: Data from the National Health Survey, no. 116
PY  - 1972///
CY  - Rockville,Md.
PB  - National Center for Health Statistics
N1  - Includes bibliographic references
ER  -