@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040969,
 author = {Omori, F.},
 issue = {4},
 journal = {Bulletin of the Imperial Earthquake Investigation Committee},
 month = {Aug},
 pages = {191--191},
 title = {Horizontal Tremor Recorder},
 volume = {1},
 year = {1907}
}