@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034390,
 author = {Nasu, Nobuji},
 issue = {1},
 journal = {東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University},
 month = {Mar},
 note = {application/pdf},
 pages = {229--236},
 title = {18. A Note on Seismic Prospecting in Coal-Fields},
 volume = {20},
 year = {1942}
}