@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034350, author = {Nagata, Takesi}, issue = {1}, journal = {東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University}, month = {Mar}, note = {application/pdf}, pages = {1--196}, title = {1. The Natural Remanent Magnetism of Volcanic Racks and Its Relation to Geomagnetic Phenomena}, volume = {21}, year = {1943} }