TY  - RPRT
TI  - The first-born child: patterns of development.
AU  - M K Ounsted
AU  - A M Hendrick
PY  - 1977
DO  - 10.1111/j.1469-8749.1977.tb07937.x
UR  - https://pubmed.ncbi.nlm.nih.gov/892241/
ID  - 892241
ER  -