@article{weko_51073_1,
   author	 = "青木,栄一",
   title	 = "Chap. 8:new developments in transportation (1955-1980) :  railroads",
   journal	 = "Technological Innovation and the Development of Transportation in Japan",
   year 	 = "1993",
   volume	 = "",
   number	 = "",
   pages	 = "229--243"
}