Six psychological studies /
Piaget, Jean
Six psychological studies / Piaget, J. ; Introd. by Elkind, D. ; Trans. by Tenzer, A. - New York : Random House, 1967. - 158 p.
Psychology
Six psychological studies / Piaget, J. ; Introd. by Elkind, D. ; Trans. by Tenzer, A. - New York : Random House, 1967. - 158 p.
Psychology