@article{oai:repository.dl.itc.u-tokyo.ac.jp:00040989,
 author = {Omori, F.},
 issue = {1},
 journal = {Bulletin of the Imperial Earthquake Investigation Committee},
 month = {Feb},
 note = {application/pdf},
 pages = {26--43},
 title = {Preliminary Note on the Seismographic Observations of the San Francisco Earthquake of April 18, 1906},
 volume = {1},
 year = {1907}
}