The child's conception of movement and speed /
Piaget, Jean,1896-1980.
Holloway, George Edward.
Mackenzie, M. J.
London Routledge & K. Paul
1970
Originally published as 'Les Notions de mouvement et de vitesse chez l'enfant', Paris: Presses Universitaires de France, 1946
Movement, Psychology of.
Child study.