@article{weko_15529_1,
   author	 = "赤間,清",
   title	 = "PAL：継承階層を扱う拡張Prolog",
   journal	 = "情報処理学会論文誌",
   year 	 = "1987",
   volume	 = "28",
   number	 = "4",
   pages	 = "322--329",
   month	 = "apr"
}