@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033451, author = {Hamada, Kazuo}, issue = {2}, journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo}, month = {Jun}, note = {application/pdf}, pages = {271--318}, title = {13. Ultra Micro-Earthqfwafces in the Area around Matsushiro}, volume = {46}, year = {1968} }