@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033970,
 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 = {291--300},
 title = {Electrical State and Seismicity beneath Japan},
 volume = {34},
 year = {1957}
}