@inproceedings{weko_165418_1,
   author	 = "北内,啓 and 高木,徹 and 山本,健一郎",
   title	 = "文書特徴を利用した教育コンテンツの難易度判定",
   booktitle	 = "第64回全国大会講演論文集",
   year 	 = "2002",
   volume	 = "2002",
   number	 = "1",
   pages	 = "13--14",
   month	 = "mar"
}