@article{oai:repository.dl.itc.u-tokyo.ac.jp:00033271,
 author = {Santo, Tetsuo},
 issue = {6},
 journal = {東京大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, University of Tokyo},
 month = {Jan},
 note = {application/pdf},
 pages = {1107--1119},
 title = {59. Regional Variation of the Passive Detectability of Earthquakes in the World},
 volume = {48},
 year = {1971}
}