00322nam a2200121Ia 4500020001500000082002100015100002500036245006500061260003600126300002800162500000500190700000500195  a0817643532  a515.73bSt817.HA  aSteffens, Karl-Georg  aThe history of approximation theorybfrom Euler to Bernstein  aBostonbBirkhauser Verlagc2006  axix, 219p. Bibl. Index.  a  a