@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040851,
 author = {Omori, F.},
 issue = {1},
 journal = {Bulletin of the Imperial Earthquake Investigation Committee},
 month = {Mar},
 note = {application/pdf},
 pages = {33--39},
 title = {On the Relation between the Duration of the Preliminary Tremor and the Epicentral Distance for Near Earthquakes},
 volume = {9},
 year = {1918}
}