@article{oai:ismrepo.ism.ac.jp:00032818,
 author = {Aoyama, Hirojiro and Nisihira, Sigeki and Zama, Nobuo},
 issue = {5},
 journal = {統計数理研究輯報, The research report of the I.S.M.},
 month = {Nov},
 note = {継続後誌：統計数理研究所彙報},
 pages = {1--5},
 title = {Abstract (Educational surveys （II）)},
 year = {1951}
}