@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034232,
 author = {Koshikawa, Yoshiaki},
 issue = {1-4},
 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 = {21--25},
 title = {4. Magnetic Survey in the Area of Topographical Deformation of Volcano Usu},
 volume = {27},
 year = {1950}
}