@techreport{weko_40708_1,
   author	 = "今郷詔 and 西村,美苗",
   title	 = "SGMLにおけるDTD導出体系",
   year 	 = "1996",
   institution	 = "（株）リコー情報通信研究所, （株）リコー情報通信研究所",
   number	 = "70(1996-FI-042)",
   month	 = "jul"
}