Powell, R.E. <br/><br/>
Summability theory and its applications   
by R.E.Powell, S.M.Shah 
 - London  Van-Nostrand Reinhold Company  1972 
 - ix, 178p. 
 - New University Mathematics Series .
<br/><br/><label>ISBN: </label>0442066252 
<br/><br/><label>LCCN: </label>78-188530 
<br/><br/><label>Dewey Class. No.: </label>515.243  / N72