@article{weko_60171_1,
   author	 = "Kazuyuki,Imafuji",
   title	 = "Graph Programming Language One (GPL/I)",
   journal	 = "Information Processing in Japan",
   year 	 = "1973",
   volume	 = "13",
   number	 = "0",
   pages	 = "80--88",
   month	 = "jan"
}