TY  - BOOK
AU  - Beard,Ruth Mary
TI  - An outline of Piaget's developmental psychology for students and teachers
U1  - 155.4 
PY  - 1969///]
CY  - New York
PB  - Basic Books
KW  - Piaget, Jean,
KW  - Child psychology
N1  - Bibliography: p. 123-128
ER  -