@article{weko_60007_1,
   author	 = "M.Takizawa and E.Hamanaka",
   title	 = "The Four-Schema Concept as the Gross Architecture of Distributed Databases and Heterogeneity Problems",
   journal	 = "Journal of Information Processing ",
   year 	 = "1979",
   volume	 = "2",
   number	 = "3",
   pages	 = "134--142",
   month	 = "nov"
}