@techreport{weko_20983_1,
   author	 = "大石雅彦",
   title	 = "複合構造を持つデータ・ベースSYSTEM2000について",
   year 	 = "1977",
   institution	 = "千代田情報機器株式会社",
   number	 = "3(1977-DBS-001)",
   month	 = "may"
}