@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040850, author = {Omori, F.}, issue = {1}, journal = {Bulletin of the Imperial Earthquake Investigation Committee}, month = {Mar}, note = {附図1頁, 附図2頁}, pages = {30--32}, title = {Note on the Form of Japanese Castle Walls}, volume = {9}, year = {1918} }