@article{oai:repository.dl.itc.u-tokyo.ac.jp:00032073,
 author = {荻野, 泉},
 journal = {地震研究所研究速報},
 month = {Mar},
 pages = {159--169},
 title = {栃木県足尾地域の微小地震について},
 volume = {12},
 year = {1974}
}