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CensusCD neighborhood change database (NCDB) [electronic resource] : 1970-2000 tract data : selected variables for US Census tracts for 1970, 1980, 1990, 2000 and mapping too / Geolytics.

ability to see tracts either as they were in prior decades or "normalized" to same boundaries in 2000

tagged census research tract by ginamr ...and 3 other people ...on 07-DEC-08