@techreport{oai:ipsj.ixsq.nii.ac.jp:00020925,
 author = {石井義興 and 吉舗紀子},
 issue = {14(1980-DBS-020)},
 month = {Jul},
 title = {会話型プログラミング言語NATURAL},
 year = {1980}
}