@article{oai:repository.dl.itc.u-tokyo.ac.jp:00038628,
 author = {Tanakadate, A.},
 journal = {Publications of the Earthquake Investigation Committee in foreign languages},
 month = {Oct},
 note = {application/pdf},
 pages = {1--4},
 title = {Vertical Motion Seismometer},
 volume = {7},
 year = {1902}
}