@article{oai:shizuoka.repo.nii.ac.jp:00005793,
 author = {Nagasaki, Eizo},
 issue = {2},
 journal = {Journal of science education in Japan},
 month = {Jun},
 note = {application/pdf},
 pages = {63--71},
 title = {Hand Held Calculators in Mathematics Education of Present State in Japan},
 volume = {11},
 year = {1987}
}