An introduction to the approximation of functions Theodore J. Rivlin. Rivlin, Theodore J., 1926- Approximation theory. Functions. QA221 .R58 517.5 RII Bibliography: p. 143-147. Waltham, Mass. : Blaisdell Pub. Co. 1969. 1969. 1969 Text viii, 150 p. ; eng Blaisdell book in numerical analysis and computer science