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

 - 3rd ed 
 - Tokyo  McGraw-Hill  1972 
 - xii,481p.   
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<br/><br/><label>Subjects--Index Terms: </label>operational mathematics  Mathematical sciences  Mathematics  Number theory  Set theory  Group theory  Integral calculus  advanced Calculus  Calculus 
<br/><br/><label>Dewey Class. No.: </label>517.43