TY  - BOOK
AU  - Ausubel, David P.
AU  - Ausubel, David P.
TI  - Theory And Problems of Chil Development
SN  - 0-8089-0641-0
U1  - 155.4 
PY  - 1957///
CY  - London
PB  - Grune & stratton
ER  -