From a paper by Francis Glaton that appeared in the April 5, 1977 issue of Nature. He published a series on heredity which is seen as a big step in the development of correlation and regression analysis.
For the handful of RPN calculator fans - a community project that goes well beyond the capabilities of the old HP 42S. The WP 34S does Riemann's Zeta functions and Legendre polynomials. I have more function with Wolfram alpha on my iPhone, but this is strangely attractive. There is also an iPhone version, but somehow the physical unit is desirable.