TY  - BOOK
AU  - Mussen,Paul Henry
AU  - Baldwin,Alfred Lee
TI  - Handbook of research methods in child development
U1  - 136.702 
PY  - 1970///
CY  - New York
PB  - Wiley
KW  - Child psychology
KW  - Methodology
KW  - Psychology
KW  - Research
ER  -