Tocci, Ronald J. <br/><br/>
Digital Systems :  Principles and Applications / 
Ronald J. Tocci ; with contributions from Neal S. Widmer. 
 - Sixth 
 - Upper Saddle River, N.J. :  Prentice Hall,  c1995. 
 - xviii, 827 p. :  ill. (some col.) ;  26 cm.