Ledley, Robert Steven. <br/><br/>
Digital Computer and Control Engineering. 

 - New York :   McGraw-Hill,   1960. 
 - p. 835 
 - McGraw Hill electrical and electronic engineering series .
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONTROL<br/>TELECONTROL<br/>SISTEMAS DIGITALES<br/>COMPUTACION DIGITAL
<br/><br/><label>Universal Decimal Class. No.: </label>681.5