@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033293, author = {Nagumo, Shozaburo}, issue = {5}, journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo}, month = {Dec}, note = {application/pdf}, pages = {759--768}, title = {41. Development of the Aftershock Area and the Block Structure of the Focal Region of the 1968 Tokachi-Oki Earthquake}, volume = {48}, year = {1970} }