Resources for Homemade Greenhouses?

When we had some of our old windows replaced we saved them (leaning against the shed in the backyard at the moment) because I wanted to use the glass in a homemade greenhouse. I'd seen articles about these in Organic Gardening and in Mother Earth News and it seems perfectly sensible to me to reuse old windows for this.

Except now I can't seem to find any info on how to make the greenhouse out of old windows. I've gone to the websites of those publications with no luck. (Organic Gardening does NOT have a search feature on their site that I can find.)

I've done a few keyword Google searches, nothing yet. Does anyone out there have a website or a book that they know of that talks about this?