@article{oai:repository.dl.itc.u-tokyo.ac.jp:00015724,
 author = {今村, 明恒},
 journal = {震災豫防調査會報告},
 month = {Dec},
 pages = {101--108},
 title = {大正四年十一月上總東部ニ起リタル地震群ト大地震ノ前震トノ比較},
 volume = {92},
 year = {1920}
}