TY  - BOOK
AU  - Ginsburg,Herbert
AU  - Opper,Sylvia
TI  - Piaget's theory of intellectual development: An introduction 
U1  - 155.41/3/0924 
PY  - 1969///]
CY  - Englewood Cliffs, N.J.
PB  - Prentice-Hall
KW  - Piaget, Jean,
KW  - Cognition in children
KW  - Intellect
KW  - Education
KW  - Philosophy
N1  - Bibliogr. footnotes
ER  -