@article{weko_63_1,
   author	 = "増山,幸一",
   title	 = "製品開発のタイミング試論",
   journal	 = "雲雀野",
   year 	 = "1985",
   volume	 = "7",
   number	 = "",
   pages	 = "61--68",
   month	 = "jan"
}