@article{weko_33433_1, author = "Hagiwara,Takahiro and Iwata,Takayuki", title = "23. Summary of the Seismographic Observation of Matsushiro Swarm Earthquakes", journal = "東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo", year = "1968", volume = "46", number = "3", pages = "485--515", month = "jul" }