@article{oai:repository.dl.itc.u-tokyo.ac.jp:00034405,
 author = {Tsuboi, Chuji},
 issue = {3},
 journal = {東京帝國大學地震研究所彙報 = Bulletin of the Earthquake Research Institute, Tokyo Imperial University},
 month = {Sep},
 note = {application/pdf},
 pages = {458--475},
 title = {A Problem of Weighted Mean},
 volume = {19},
 year = {1941}
}