@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034109,
 author = {力武, 常次 and 横山, 泉 and 菱山, よね子},
 issue = {3},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Sep},
 note = {application/pdf},
 pages = {207--221},
 title = {A Preliminary Study on the Anomalous Behavior of Geomagnetic Variations of Short Period in Japan and Its Relation to the Subterranean Structure},
 volume = {30},
 year = {1952}
}