Churchill, Ruel V.  1958 <br/><br/>
Operational Mathematics 

 - 2nd Edition 
 - United States of America  McGraw-Hill  1958 
 - Pp 337  Index, Graphs, Illustrations  23 cm 
<br/><br/><label>ISBN: </label>910111213MP987 
<br/><br/><label>Dewey Class. No.: </label>515 C4758  / 1