TY  - BOOK
AU  - Hay,William Howard
AU  - Smith,Esther L.
TI  - The Hay system of child-development
U1  - 649.1 
PY  - 1936///
CY  - London
PB  - George G. Harrap
KW  - Child development
KW  - Child rearing
KW  - Children
KW  - Health and hygiene
KW  - Developmental Biology
N1  - Includes index
ER  -