A scholar needs a scan of the paper map that shows census tract boundaries. Ours is missing. The maps accompanied the 1970 Census volumes, SuDoc C3.223/11:970/228 If you can send me a scan that would be fab, we could even post it online for others to find at our tract maps website: http://libguides.lib.msu.edu/c.php?g=96120&p=628240 A tract shapefile would be a poor substitute, as they don't have 1970-era municipal boundaries. Kathleen Weessies Geosciences Librarian; Head, Map Library Michigan State University 366 W. Circle Drive, W308A East Lansing, MI 48824 (517)884-0849 [log in to unmask]