poke111, I looked at your other posts and I belive you really needn't be convinced with a source as such.( if by source you meant a research paper) I noticed that you have already figured out that there differences in IQ among races.
Anyway - my 'source' is my observation over the years, the smartest people that I'm aware of, both among developers or otherwise are disproportionately male. As a corollary some dumbest people are also disproportionately male. Never in my circle of acquaintances have I seen women being discriminated solely based on their gender. Infact I have on occasions seen a clear discrimination against men.
I did do a quick search to see if there were research papers on the subject, I could not find it. The few that I could find did not show significant differences. Now ofcourse the broader question to ask is, do we take main stream science at it's word always, ? No, is my answer. A large proportion of mainstream science is biased and rigged. I have heard/read that any research paper that shows difference in IQ among genders or race is unlikely to be published by journals.