@article{oai:tohoku.repo.nii.ac.jp:00011168,
 author = {Hamaguchi, Hiroyuki and Hasegawa, Akira},
 issue = {3},
 journal = {Science reports of the Tohoku University. Ser. 5, Geophysics},
 month = {Dec},
 note = {application/pdf, 紀要類 (bulletin), 2548659 bytes},
 pages = {119--134},
 title = {An Investigation on the Aftershocks of the Tokachi-oki Earthquake of 1968,(2)Statistical Study on Time Interval Distribution},
 volume = {20},
 year = {1970}
}