@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034240, author = {Akima, Tetuo}, issue = {1-4}, 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 = {69--74}, title = {12. A Torsional Pendulum Low-pass Filter Applied to the Study of the Earthquake Waves(Part 2)}, volume = {27}, year = {1950} }