Data Sources U.S. Census Bureau- A source for census data attribute files. Look under Data Access Tools for the 1990 Lookup files. ESRI- A great source for census data geographic boundary files. Look in the ArcData section. You will need to register (for free) and can download the data once you have logged on with your email address as your password. UCLA GIS and Database Server at OAC- A source for census data geographic boundary files. CIESIN- Consortium for International Earth Science Information Network. CSUN- The Internet Library of the Department of Geography at California State University Northridge. Center for Advanced Spatial Technologies- Guide to mostly on-line and mostly free U.S. geospatial and attribute data. Center for Spatial Analysis and Remote Sensing- (CSU Los Angeles). Penn State University Libraries- Provides Digital Chart of the World.

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