@article{oai:ismrepo.ism.ac.jp:00033245,
 author = {多賀, 保志 and Taga, Yasushi},
 issue = {10-11},
 journal = {統計数理研究所講究録},
 month = {Jan},
 pages = {459--466},
 title = {効率の一問題},
 volume = {7},
 year = {1952}
}