00309nam a2200109Ia 450000500170000000800410001708200160005810000160007424500590009026000420014930000080019120260224040836.0260224s9999||||xx |||||||||||||| ||und||  a001.644 ROS  aRoss, R.G.  0aData base systems: design, implementation & management  aNew York: A Division of Americac1978  a229