TY  - BOOK
AU  - Ginsburg,Herbert
AU  - Opper,Sylvia
TI  - Piaget’s theory of intellectual development: an introduction
SN  - 13-674952-6
PY  - 1969///
CY  - Englewood Cliffs
PB  - Prentice-Hall, Inc.
KW  - Piaget, Jean
N1  - Бібліогр. : c. v-6, Index
ER  -