@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033837, author = {Kanai, Kiyoshi and Tanaka, Teiji}, issue = {1}, journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo}, month = {Mar}, note = {application/pdf}, pages = {97--114}, title = {5. On Microtremors 8}, volume = {39}, year = {1961} }