Spencer, Donald, D. <br/><br/>
Data processing: an introduction 

 - 2nd ed. 
 - Columbus: Charles E. Merrill  1982 
 - xv,396,G-7,I-10.  24 cm. 
<br/><br/><label>ISBN: </label>0675097878 
<br/><br/><label>Dewey Class. No.: </label>004  / SPE