Churchill,Ruel b.  x <br/><br/>
Operational mathematics.  x 

 - 2nd ed. 
 - New york.  Mcgraw-hill.  1958 
 - ix,337 
<br/><br/>x 
<br/><br/><label>ISBN: </label>x 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Mathematics Mathematics. 
<br/><br/><label>Dewey Class. No.: </label>510/CHO