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U.S. Census Bureau [on-line].  2002.  TIGER®, TIGER/Line® and TIGER-Related Products.

Environmental Systems Research Institute, Inc. (ESRI) [on-line].  2002.  ESRI--GIS & Mapping Software.

Geography Network [on-line].  2002.  Data--geographic data for your mapping system. [on-line].  2002.  Data for your GIS - Links to Data Sources.

SBC Southwestern Bell.  2001.  Greater Austin Yellow Pages and Business White Pages.  Austin, TX: Southwestern Bell.

Yahoo! [on-line].  2002.  Yahoo! Search Engine.

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