Source code:
Introduction to Numerical Analysis 2nd Edition F.B. Hildebrand [1987]
many sanity: Milton Abramowitz and Irene A. Stegun
Legendre is the principal Quadrature in practical Engineering works.
BTW, if you have higher Legendre than given 63/64, welcome to add/attach.
Thanks Andrey for your Polyroots Smath Examples
Jean

Maths Polyroots Rodrigues Wr.sm (13.45 KiB) downloaded 879 time(s).
Maths Polyroots Hermite Wr SPECIFIC.sm (20.06 KiB) downloaded 902 time(s).
Maths Polyroots Radau Wr.sm (28.65 KiB) downloaded 903 time(s).
Maths Polyroots Jacobi Wr.sm (19.23 KiB) downloaded 844 time(s).
Maths Polyroots Laguerre Wr.sm (31.96 KiB) downloaded 851 time(s).
Maths Polyroots Lobatto Wr.sm (48.38 KiB) downloaded 848 time(s).
Maths Polyroots ChebyShev Wr.sm (97.91 KiB) downloaded 854 time(s).
Maths Polyroots Hermite Wr.sm (97.52 KiB) downloaded 884 time(s).
Maths Polyroots Legendre Wr.sm (206.12 KiB) downloaded 877 time(s).