Ledley, R.S. <br/><br/>
Digital computer and control engineering 

 - New York  McGraw Hill  1960 
 - 815 
<br/><br/> Dormitory 
<br/><br/><label>Subjects--Uniform Titles: </label><br/>Digital Computer
<br/><br/><label>Dewey Class. No.: </label>621.34  / L339I