The psychology on the child /
Piaget, Jean, 1896-1980
The psychology on the child / Jean Piaget and Bärbel Inhelder ; tr. Helen Weaver. - New York : Basic Books, 1969. - 173 p.
Niño, Estudio del
The psychology on the child / Jean Piaget and Bärbel Inhelder ; tr. Helen Weaver. - New York : Basic Books, 1969. - 173 p.
Niño, Estudio del