Family background, early development, and intelligence of children 6-11 years, United States /
[by Jean Roberts and Arnold Engel]

APA Citation

Roberts, J., Engel, A., National Center for Health Statistics (U.S.). (1974). Family background, early development, and intelligence of children 6-11 years, United States. Rockville, Md.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, Division of Health Examination Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off..

MLA Citation

Roberts, Jean, 1918-, Arnold Engel, and National Center for Health Statistics (U.S.). Family Background, Early Development, And Intelligence of Children 6-11 Years, United States. Rockville, Md.: U.S. Dept. of Health, Education, and Welfare, Public Health Service, Health Resources Administration, National Center for Health Statistics, Division of Health Examination Statistics : for sale by the Supt. of Docs., U.S. Govt. Print. Off., 1974.