![[ACM Press the twentieth SIGCSE technical symposium - Louisville, Kentucky, United States (1989.02.23-1989.02.24)] Proceedings of the twentieth SIGCSE technical symposium on Computer science education - SIGCSE '89 - A unified approach for multilevel database security based on inference engines]()
[ACM Press the twentieth SIGCSE technical symposium - Louisville, Kentucky, United States (1989.02.23-1989.02.24)] Proceedings of the twentieth SIGCSE technical symposium on Computer science education - SIGCSE '89 - A unified approach for multilevel database security based on inference enginesNull, Linda M.; Wong, Johnny · 1989