Butzer, P L, ed. <br/><br/>
On approximation theory: Proceedings of the conference held at the mathematical research institute at Oberwolfach, black forest, August 4-10, 1963 

 - Verlag  [n.p.]  1972 
 - xvi, 261 p. 
<br/><br/><label>Dewey Class. No.: </label>511.4 B985O