Product Type Two-Point Gauss-Legendre-Simpson's Integration [D1] (Algorithm A438) CACM December, 1972 Boland, W. R. numerical integration, product type quadrature, Gaussian quadrature, Simpson's rule 5.16 CA721213 JB January 27, 1978 9:08 AM 2242 5 2242 2242 5 2242 2242 5 2242