# Definition/explantion of tabular column types

In a question I recently asked (How to make table with rotated table headers in LaTeX) the accepted answer used some features of tabular column types that I was not familiar with, e.g.,

\begin{tabular}{@{} cl*{10}c @{}}

I tried Googling for latex "@{}" but that just brought up some generic LaTeX pages.

Where can I got to learn about @{} tabular columns and other options?

Okay, so I found the answer in appendix C.10 of Lamport's book, but I'd like to know where to look for electronic resources.

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