TY  - BOOK
AU  - Piaget,Jean
TI  - The child's conception of movement and speed
AV  - BF723.M6 P53 1970b
U1  - 155.41/2 
PY  - 1970///]
CY  - New York
PB  - Basic Books
KW  - Motion perception (Vision)
KW  - Local
KW  - Child psychology
N1  - Translation of Les notions de mouvement et de vitesse chez l'enfant
ER  -