Ipinle Kalifonia "Government Code Section 420-429.8". Official California Legislative Information. Retrieved 2007-02-26.  "Table 1: Annual Estimates of the Resident Population for the United States, Regions, States, and Puerto Rico". U.S. Census Bureau. December 22, 2008. Retrieved 2009-01-15.  Àṣìṣe ìtọ́kasí: Invalid <ref> tag; no text was provided for refs named usgs