Document Classes ⇒ Turn off natbib bibliography making

[Lewisham]

Hi guys,
I'm having a heck of a time with natbib and the official ACM document style, and it's driving me nuts. I'm sure I must be missing something obvious, but I can't see it

Code: Select all

\documentclass[]{acm_proc_article-sp}
\usepackage[numbers]{natbib}

\bibliographystyle{abbrvnat}
\bibliography{mybib}

When I run this, the main body has the correct numerical [1] notation, but the bibliography doesn't come out with the numberical labels. I've tried trashing my aux files multiple times, to no effect. There's a conflict with the ACM style that's removing the notation.

Is it possible to have natbib turned off for the bibliography, and just have the \citep and \citet commands available to me?