@techreport{weko_49725_1,
   author	 = "木本,晴夫",
   title	 = "キーワード自動抽出と重要度評価",
   year 	 = "1987",
   institution	 = "NTT情報通信処理研究所",
   number	 = "84(1987-NL-064)",
   month	 = "nov"
}