TY  - RPRT
TI  - Social development in infancy: a 25-year perspective.
AU  - R D Parke
PY  - 1989
DO  - 10.1016/s0065-2407(08)60281-5
UR  - https://pubmed.ncbi.nlm.nih.gov/2665427/
ID  - 2665427
ER  -