The psychology of the child /
Piaget, Jean,1896-1980.
Inhelder, Bärbel.
Weaver, Helen,1931-
London Routledge & K. Paul
1969
This translation originally published, New York: Basic Books, 1969. Originally published as 'La Psychologie de l'enfant'. Paris: Presses Universitaires de France, 1966
bibl p161-162
Child study.