Calculation of Fourier Integrals (Algorithm R418) CACM June, 1972 Einarsson, B. quadrature, Filon quadrature, integration, Filon integration, Fourier coefficients, Fourier integrals, Fourier series, spline,spline approximation, spline quadrature, extrapolation, Richardson extrapolation 5.16 CA720615 JB January 30, 1978 3:53 PM 2330 5 2330 2330 5 2330 2330 5 2330