@techreport{weko_51688_1,
   author	 = "穂坂衛 and 黒田満",
   title	 = "CADにおける曲線曲面の創成について",
   year 	 = "1975",
   institution	 = "東大宇航研, 岐阜大",
   number	 = "3(1975-ICS-020)",
   month	 = "may"
}