About UTSUGAWA TAKAKO
About 首都大学東京 大学院
About SHIRAI MASAAKI
About gravel
About sand
About rafting
About surface structure
About roundness
About sediment load
About wear
About erosion(geoscience)
About 円磨度
About Sedimentary petrology in general
About 砕屑
About 研究
About 展望
About 注目