The Wikipedia article raganwald kindly linked to has an archived set of talk pages that go on almost endlessly, as the article has long been the subject of edit-warring. That article and related pages have been the subject of an Arbitration Committee case (opened at about the time I became a wikipedian, by coincidence)

http://en.wikipedia.org/wiki/Wikipedia:Arbitration/Requests/...

with ongoing administrative sanctions. In other words, I'm not sure if the article is currently in good enough shape to recommend. The Wikipedia user bibliography "Intelligence Citations"

http://en.wikipedia.org/wiki/User:WeijiBaikeBianji/Intellige...

points to sources that are generally reliable, as does the bibliography "Anthropology, Human Biology, and Race Citations."

http://en.wikipedia.org/wiki/User:WeijiBaikeBianji/Anthropol...