@techreport{weko_39158_1,
   author	 = "堂山真一 and 竹内,英二",
   title	 = "ソフトウェアCADにおける図形処理法の一考察",
   year 	 = "1986",
   institution	 = "NTT電気通信研究所, NTT電気通信研究所",
   number	 = "43(1986-CG-022)",
   month	 = "jul"
}