Hanson, Peegy. <br/><br/>
Operating data entry system   
by Peegy Hanson 
 - New Jersey  Prentice Hall  1977 
 - xi, 290p. 
<br/><br/><label>ISBN: </label>0136378196 
<br/><br/><label>Dewey Class. No.: </label>004.71  / N77