@article{weko_33450_1, author = "Kayano,Ichiro", title = "12. Determination of Origin Times, Epicenters and Focal Depths of Aftershocks of the Niigata Earthquake of June 16, 1964 : A Preliminary Report of the Cooperative Study of Aftershocks of the Niigata Earthquake", 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 = "2", pages = "223--269", month = "jun" }