@book{ BA61314673,
  author    = "北川, 敏男  and 国沢, 清典  and 森口, 繁一 ",
  title     = "経営情報システム",
  publisher = "日本科学技術連盟",
  year      = "1970",
  series    = "日科技連数学計画シンポジウム報文シリーズ",
  number    = "No. 21",
  URL       = "http://ci.nii.ac.jp/ncid/BA61314673"
}