TY - BOOK AU - Butzer,Paul Leo AU - Nessel,Rolf J.,1936- TI - Fourier analysis and approximation SN - 0121485013 PY - 1971/// CY - New York PB - Academic Press KW - Fourier analysis KW - Approximation theory N1 - Bibliography: v. 1, p. 521-546; v. 1. One-dimensional theory ER -