Churchill, Ruel V.  <br/><br/>
Operational mathematics 

 - 2a. ed 
 - Tokyo :   McGraw-Hill,   1958. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>CONTROL AUTOMATICO. INGENIERIA
<br/><br/><label>Universal Decimal Class. No.: </label>681.5