@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033909,
 author = {Kawasumi, Hirosi and Shima, Etsuzo and Sibano, Muturo and Yanagisawa, Masumi},
 issue = {4},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Dec},
 note = {application/pdf},
 pages = {447--453},
 title = {A Seismographic Starter Using a Phototransistor},
 volume = {36},
 year = {1958}
}