@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033672, author = {The Research Group for Explosion Seismology}, issue = {3}, 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 = {515--531}, title = {26. Crustal Structure in Central Japan along Longitudinal Line 139°E as Derived from Explosion-Seismic Observations. : Part 1. Explosions and Seismic Observations}, volume = {42}, year = {1964} }