United States. Children's Bureau
, Murray, Marjorie Frances, 1890-
and Eliot, Martha M., 1891-1978.
The Child from One to Six : His Care and Training, Bureau Publication No. 30 ,
Washington, D.C:
Government Printing Office,
1931, https://fraser.stlouisfed.org/title/8323,
accessed on September 10, 2024.