@techreport{weko_20979_1,
   author	 = "椿正明",
   title	 = "SDSP - System Design/Development Standard Procedure",
   year 	 = "1977",
   institution	 = "千代田化工建設（株）",
   number	 = "12(1977-DBS-002)",
   month	 = "jul"
}