Date:  Tue, 11 Mar 1997 10:24:29 -0500
From:  Matthew James Gordon <mjgordon[AT SYMBOL GOES HERE]UMICH.EDU>
Subject: Re: mapping dialect spread

I think the article you're almost remembering is "Some patterns of
linguistic diffusion" by Guy Bailey et al., which appeared in Language
Variation and Change, (1993). This presents some interesting results from
the SOD (Survey of Oklahoma Dialects) Project and does investigate some
"apparent time" data.