@techreport{weko_21027_1,
   author	 = "椿正明",
   title	 = "CHEIS CHIYODA ENGINEERING INFORMATION SYSTEMについて",
   year 	 = "1974",
   institution	 = "千代田化工建設（株）",
   number	 = "13(1973-DBS-009)",
   month	 = "feb"
}