@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033327, author = {Rikitake, Tsuneji}, 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 = {189--203}, title = {13. A Theory of Frequency-Dependent Effect of an Island on Geomagnetic Variations}, volume = {48}, year = {1970} }