@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033638,
 author = {AKI, Keiiti and MATUMOTO, Hideteru and TSUJIURA, Masaru and MARUYAMA, Takuo},
 issue = {2},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Sep},
 note = {application/pdf},
 pages = {381--397},
 title = {24. A Digital, Tele-recorded, Long-Period Seismograph System},
 volume = {43},
 year = {1965}
}