@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033897, author = {Yukutake, Takesi}, issue = {1}, journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo}, month = {May}, note = {application/pdf}, pages = {13--32}, title = {Attenuation of Geomagnetic Secular Veriation through the Conducting Mantle of the Earth}, volume = {37}, year = {1959} }