Butzer, P L, ed <br/><br/>
Linear operations and approximation, 2v; proceedings of the conference held at the oberwolfach mathematical research institute, black forest, August 14-22, 1971 

 - Basel  Birkhauser Verlag  1972 
 - 506 p. 
<br/><br/><label>Dewey Class. No.: </label>515.624 B985L