Bureau of Land Management National Historic Oregon Trail Interpretive Center. Retrieved June 28,2009 from End of Oregon Trail Interpretive Center website. Website: . Cabildo-The Louisiana Purchase (2009). Retrieved June 28, 2009, from Louisiana State Museum. Web site: The California Gold Rush (2009). Retrieved June 28, 2009, from Kidport Web site: http://www.kidport.com/RefLib/UsaHistory/CalGoldRush/CalGoldRush.htm Carlson, Laurie (1996). Chicago, IL: Chicago Westward Ho! An Activity Guide to the Wild West. Review Press. Dirtmeister: Simple Machines (2009). Scholastic. Retrieved June 28, 2009, from Scholastic.Website: End of Oregon Trail Interpretive Center. Retrieved June 28, 2009, from Clackamas Heritage Partners, Historic Oregon Country. Web site: Georgia Performance Standards Frameworks for Science-Grade 4 (2007) Retrieved June 28, 2009, from Georgia Department of Education Web site: Historical Development of the California Trail (1999). Retrieved June 28, 2009, from Trails West, Inc. Web site: Levine, E. (1986). New York, NY: Scholastic, Inc. If You Traveled West in a Covered Wagon. Louisiana Purchase (2008). Retrieved June 28, 2009, from Gateway New Orleans Web site: Mapping on the Trail (2008). Retrieved June 28, 2009, from Smithsonian Institution and EdGate Web site: http://www.edgate.com/lewisandclark/mapping_on_trail.html
Bureau of Land Management National Historic Oregon Trail Interpretive Center. Retrieved June 28,2009 from End of Oregon Trail Interpretive Center website. Website: . Cabildo-The Louisiana Purchase (2009). Retrieved June 28, 2009, from Louisiana State Museum. Web site: The California Gold Rush (2009). Retrieved June 28, 2009, from Kidport Web site: http://www.kidport.com/RefLib/UsaHistory/CalGoldRush/CalGoldRush.htm Carlson, Laurie (1996). Westward Ho! An Activity Guide to the Wild West. Chicago, IL: Chicago Review Press. Dirtmeister: Simple Machines (2009). Scholastic. Retrieved June 28, 2009, from Scholastic.Website: End of Oregon Trail Interpretive Center. Retrieved June 28, 2009, from Clackamas Heritage Partners, Historic Oregon Country. Web site: Georgia Performance Standards Frameworks for Science-Grade 4 (2007) Retrieved June 28, 2009, from Georgia Department of Education Web site: Historical Development of the California Trail (1999). Retrieved June 28, 2009, from Trails West, Inc. Web site: Levine, E. (1986). If You Traveled West in a Covered Wagon. New York, NY: Scholastic, Inc. Louisiana Purchase (2008). Retrieved June 28, 2009, from Gateway New Orleans Web site: Mapping on the Trail (2008). Retrieved June 28, 2009, from Smithsonian Institution and EdGate Web site: http://www.edgate.com/lewisandclark/mapping_on_trail.html
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