TY  - BOOK
AU  - Beard,Ruth M.
TI  - A outline of Piaget's developmental psychology for students and teachers
AV  - LB775 P45 B4.5
PY  - 1969///
CY  - London
PB  - Routledge
KW  - Piaget, Jean,
KW  - Psicología educativa
ER  -