@techreport{oai:ipsj.ixsq.nii.ac.jp:00022719,
 author = {関栄四郎 and 二階堂徳也},
 issue = {42(1980-SE-017)},
 month = {Feb},
 title = {構造化COBOLの実用化},
 year = {1981}
}