I found that Ancestry.com has digitized the "Prairie Farmer's Reliable Directory of Farmers and Breeders, Rock County, Wisconsin, 1917" BUT you can not find this in the Ancestry.com card catalog and you can not find it in the city directories database!(???) (It's under Wisconsin, Not Stated, for some reason.)

Here's the direct link:

http://search.ancestry.com/Browse/view.aspx?dbid=2469&ii...

Just thought I'd share....