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

 - 2nd ed. 
 - London  ; Mcgraw-Hill Book  , 1958 
 - ix,335p. 
<br/><br/><label>ISBN: </label>  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics
<br/><br/><label>Dewey Class. No.: </label>510  / CHU