@techreport{weko_39835_1,
   author	 = "金子,靖正",
   title	 = "都市ガス業界の意思決定支援システム",
   year 	 = "1991",
   institution	 = "ケージー情報システム株式会社",
   number	 = "41(1991-IS-034)",
   month	 = "may"
}