See my point 2 here
https://github.com/citation-style-language/styles/pull/386#issuecomment-13988767

TL;DR: "in press" support.

If that's not the official way to support it, feel free to adjust. I think
it works out for journal articles. The only non-numeric page ranges I can
think of are supplemental material, but no one cites that directly.

Since this is being modified, would be good to add a comment about it.

It would also be nice to add a link to test data, which I posted on the
pull request, but i don't think I added it to the csl file.

(Sorry about my previous response. I'm replying from email, so I didn't see
previous convo and didn't have time to take a look)
On Jun 5, 2014 12:25 PM, "Sebastian Karcher" <notifications@github.com>
wrote:

> In annual-reviews-author-date.csl:
>
> >            </else>
> >          </choose>
> >        </if>
> > +      <else-if type="chapter" match="any">
> > +        <choose>
> > +          <if is-numeric="page" match="all">
>
> any recollection on why you added the is-numeric test for page numbers?
>
> —
> Reply to this email directly or view it on GitHub
> <https://github.com/citation-style-language/styles/pull/976/files#r13452373>
> .
>