Endnotes
1. Central Intelligence Agency, The World Factbook, United States. https://www.cia.gov/library/publications/the-world-factbook/print/us.html (accessed July 26, 2008) Statistics on U.S. population.
2. U.S. Census Bureau, Population Division: U.S. and World Population Clocks - POPClocks. http://www.census.gov/main/www/popclock.html (accessed July 13, 2008)
3. Wikipedia contributors, "List of Countries by Population," Wikipedia, The Free Encyclopedia, http://en.wikipedia.org/wiki/List_of_countries_by_population (accessed July 27, 2008).
1. Table 3, Rough Rice Yield (t/ha), by Country and Geographical Region, 1961-2006, http://www.irri.org/science/ricestat/data/may2008/WRS2008-Table03.pdf (accessed July 27, 2008).
4. Sage V Foods, "Rice Production in the World and in the U.S.," Sage V Foods, http://www.sagevfoods.com/MainPages/Rice101/Production.htm (accessed July 13, 2008).
5. California Department of Education, Mathematics Framework for California Public Schools, Kindergarten Through Grade Twelve (2005), 59-67.
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