Ginsburg, Herbert
Piaget's Theory of Intellectual Development :An Introduction / Herbert Ginsburg; Sylvia Opper, . - New Jersey : Prentice-Hall , 1969 . - XI,237 p.; 22 cm.
Piaget, Jean , 1896-1980
Piaget's Theory of Intellectual Development :An Introduction / Herbert Ginsburg; Sylvia Opper, . - New Jersey : Prentice-Hall , 1969 . - XI,237 p.; 22 cm.
Piaget, Jean , 1896-1980