%0 Journal Article
%T Perceptual and cognitive (or operational) structures in the development of the concept of space in the child
%J Acta psychologica
%D 1955
%A Piaget, J.
%V 11
%N 
%P 41-46
%X <p>[Abstract unavailable]</p>
%G 
%I Elsevier Publishing
%@ 0001-6918
%U http://dx.doi.org/10.1016/S0001-6918(55)80062-5