@techreport{weko_20598_1,
   author	 = "佐藤亮",
   title	 = "情報システム開発方法論のデータモデルと実現",
   year 	 = "1990",
   institution	 = "筑波大学",
   number	 = "36(1990-DBS-077)",
   month	 = "may"
}