Gradshtein IS <br/><br/>
Direct and coverse theoems   The elements of symbol    
Gradshtein IS 
 - International Series of Monographs on Pure and Applied Mathematics ed by I N Sneddon etc, 27 .
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Dewey Class. No.: </label>B1, K3