@inproceedings{oai:ipsj.ixsq.nii.ac.jp:00232089,
 book = {第12回プログラミング—シンポジウム報告集},
 month = {Jan},
 publisher = {情報処理学会},
 title = {はしがき},
 volume = {1971},
 year = {1971}
}