Orman, Levent V. <br/><br/>
Elements of information systems :  components and architecture / 
Levent V. Orman. 
 - New York :  Toronto :  New York :  Macmillan ;  Collier Macmillan Canada ;  Maxwell Macmillan International Pub. Group,  c1991. 
 - x, 261 p. :  ill. ;  23 cm.