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Archive of Census Related Products
(ACRP): 1990 Zip Equivalency Files
The
1990 Zip Equivalency Files portion of the Archive of Census
Related Products (ACRP) contains population and housing data
derived from the U.S. Census Bureau's 1990 STF3B header file.
The data are available at the census block and census blockgroup
levels, and encompass 5-digit zip codes, POLygon IDentification
(POLID) block fields that correspond to the POLID of the Tiger-based
boundary file, and population centroids. This portion of the
ACRP is produced by the Columbia University Center for International
Earth Science Information Network (CIESIN).
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