-------- Original Message -------- Subject: socialexplorer.com Date: Fri, 14 Dec 2007 00:24:44 -0600 From: Dennis McClendon <[log in to unmask]> To: Air Photo & Geospatial Systems Forum Maps <[log in to unmask]> I'm working on some maps for an academic book for which I'd like to look at tract-level censu data from 1910, 1920, and 1930. Apparently this is available on socialexplorer.com, but only to subscriber libraries. So how would I find a Chicago library that's a subscriber?