2010-02-09T19:33:09Z http://aerialphotos.grainger.uiuc.edu/oai.asp University of Illinois Library at Urbana-Champaign, Historic Illinois Aerial Photo Imagebase http://aerialphotos.grainger.uiuc.edu/oai.asp 2.0 thabing@uiuc.edu 1998-07-27 transient YYYY-MM-DD oai aerialphotos.grainger.uiuc.edu : oai:aerialphotos.grainger.uiuc.edu: