@article{oai:repository.dl.itc.u-tokyo.ac.jp:00035030,
 author = {Takahasi, Ryutaro},
 journal = {東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University},
 month = {Apr},
 note = {application/pdf},
 pages = {231--244},
 title = {A Graphical Determination of the Position of the Hypocentre of an Earthquake and the Velocity of the Propagation of the Seismic Waves},
 volume = {6},
 year = {1929}
}