Here is one from 2008 code4lib journal:
On 24 February 2012 16:49, Cynthia Ng <[log in to unmask]> wrote:
> I would definitely like to see something like this written up as a
> journal article. "How to expose your collection to search engines"
> On Fri, Feb 24, 2012 at 11:14 AM, Stern, Randall
> <[log in to unmask]> wrote:
> > In order to make more open access data available on the web, this is
> what Harvard does for most of our silo catalogs of images, finding aids,
> geospatial data sets, and page turned digital objects (full text) - creates
> easily crawlable, meta-tagged index pages for each item.
> > The result is that for our finding aids (lots of text data exposed) we
> see about 3-4X as many referrals from search engines as we do searches in
> our native interface, and for images (brief metadata exposed) about a 30%
> bump for search engine referrals.
> > -----------------------------------
> > Date: Thu, 23 Feb 2012 22:54:33 +0000
> > From: Dave Caroline <[log in to unmask]>
> > Subject: Re: Local catalog records and Google, Bing, Yahoo!
> > To avoid sessions and other silliness just expose a search engine
> > friendly format without sessions.
> > As I dont have local visitors google traffic matters.
> > 86.62% Search Traffic
> > 2.41% Referral Traffic
> > 10.98% Direct Traffic
> > For my tiny corner on the web
> > Dave Caroline