As good as that is, see this: http://dlmf.nist.gov/, the online companion to the truly epic NIST Handbook of Mathematical Functions, itself the modern successor to Abramowitz and Stegun.
The online version also lets you get LaTeX for everything, and has many other features. But the print version is a thing of beauty.
In full disclosure, the Editor in Chief and Mathematics Editor, who devoted the last 13 years of his professional life to the project, was my stepfather.