%0 Journal Article
%A D. Okada
%A T. Matsuura 
%T Japanese Astronomy Curriculum in Schools and the Spatial Cognitive Ability of Elementary and Junior High School Students
%J Journal for geometry and graphics
%D 2018
%P 139-147
%V 22
%N 1
%I mathdoc
%U http://geodesic.mathdoc.fr/item/JGG_2018_22_1_JGG_2018_22_1_a12/
%F JGG_2018_22_1_JGG_2018_22_1_a12