The letters PDF or symbol indicate a document is in the Portable Document Format (PDF). To view the file you will need the Adobe® Acrobat® Reader, which is available for free from the Adobe web site.
Source: U.S. Census Bureau, Office of Analysis and Executive Support (Policy Office), FOIA and Information Branch
Census Bureau Links: Home · Accessibility · Search · Subjects A-Z · FAQs· Census 2010 · Information Quality · Privacy Policy · Contact Us