United States. Office of Child Development & Grotberg, E. H. (1977). 200 years of children. U.S. Dept. of Health, Education, and Welfare, Office of Human Development, Office of Child Development.

United States. Office of Child Development and Edith Henderson Grotberg. 200 Years of Children. [Washington]: U.S. Dept. of Health, Education, and Welfare, Office of Human Development, Office of Child Development, 1977.

United States. Office of Child Development and Edith Henderson Grotberg. 200 Years of Children. U.S. Dept. of Health, Education, and Welfare, Office of Human Development, Office of Child Development, 1977.