Logical thinking in children; research based on Piaget's theory.
Sigel, Irving E.,
Logical thinking in children; research based on Piaget's theory. - New York, Holt, Rinehart and Winston [1968] - xv, 541 p. ill.
Conservation of substance (Psychology)
Child psychology.
MED. BF723.C68 / S5
Logical thinking in children; research based on Piaget's theory. - New York, Holt, Rinehart and Winston [1968] - xv, 541 p. ill.
Conservation of substance (Psychology)
Child psychology.
MED. BF723.C68 / S5