@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033870, author = {Rikitake, Tsuneji}, issue = {4}, journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo}, month = {Jan}, note = {application/pdf}, pages = {545--570}, title = {The Anomalous Behaviour of Geomagnetic Variations of Short Period in Japan and Its Relation to the Subterranean Structure. The 9th report}, volume = {37}, year = {1960} }