@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033717,
 author = {Hagiwara, Takahiro and Karakawa, Ikuo and Kayano, Ichiro and Kaminuma, Katsutada},
 issue = {3},
 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 = {659--680},
 title = {Foreshocks, Aftershocks and an Earthquake Swarm Detected by the Micro-earthquake Observation},
 volume = {41},
 year = {1963}
}