Korovkin, P. P. <br/><br/>
Linear operators and approximation theory  / 

 - Delhi:  Hindustan,  1960 
 - vii, 222p. Index 
 - International monographs on Advanced Mathematics & Physics .
<br/><br/> "Translated from the Russian". 
<br/><br/><label>Dewey Class. No.: </label>515.72  / K84.LO