@techreport{weko_21015_1,
   author	 = "石田喬也",
   title	 = "データ・ベース管理システムのユーザ動向について",
   year 	 = "1975",
   institution	 = "三菱電機（株）",
   number	 = "24(1974-DBS-021)",
   month	 = "mar"
}