Trends in Research on Teaching and Learning Spatial Cognition in Elementary Social Studies in Japan: A Systematic Review from 1989 to 2019 論文 WATANABE Takumi・SAKAUE Hiroaki・OSAKA Yu・OKADA Ryosuke ·2021 ·『Geographical review of Japan series B』 94(2) pp. 49-64 doi:10.4157/geogrevjapanb.94.49