Play Behavior in the Year-Old Infant: Early Sex Differences USPHS
- Author(s):
- Goldberg, Susan; Lewis, Michael
- Publication Year:
- 1969
- Source:
- Child Development, v40 n1 p21-31, Mar 1969
- Document Type:
- Article
- Page Count:
- 11
- Subject/Key Words:
- National Institute of Mental Health, United States Public Health Service (USPHS), Infant Behavior, Observational Studies, Parent Influence, Sex Differences