A StepWise Regression Subroutine

Hello,
I'm dealing with some data these days, and need a subroutine to do
the stepwise regression.
Would somebody give me one, sourcecode best, algorithm works too. Thank
you!
PS. I already have one version of that subroutine, but it was
written very ugly with more then
ten GOTOs and other confusing use. I almost cann't understand it!
Thanks.

.

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