@techreport{weko_20902_1,
   author	 = "松下温 and 吉田誠",
   title	 = "データベースにおけるDirectoryの細かさとConcurrency度との関係",
   year 	 = "1981",
   institution	 = "沖電気工業株式会社, 沖電気工業株式会社",
   number	 = "32(1981-DBS-027)",
   month	 = "nov"
}