%0 Journal Article
%T Systems of spatial reference and their interactions in preschool children. I. Degree of constraint in perceptive data
%J Année psychologique
%D 1973
%A Berthoud, M.
%V 73
%N 1
%P 23-36
%X <p>[Abstract unavailable]</p><p>Language: fr</p>
%G fr
%I Presses Universitaires De France
%@ 0003-5033
%U http://dx.doi.org/