@article{oai:repository.dl.itc.u-tokyo.ac.jp:00000323,
 author = {GRAY, T.},
 journal = {Transactions of the Seismological Society of Japan},
 month = {},
 note = {application/pdf},
 pages = {49--52},
 title = {INSTRUCTIONS FOR SETTING UP THE GRAY-MILNE SEISMOGRAPH},
 volume = {12},
 year = {1888}
}