Westward Expansion

http://www.snowcrest.net/jmike/westexp.html

http://www.digitalhistory.uh.edu/modules/westward/index.cfm

http://www.sonofthesouth.net/texas/westward-expansion.htm

http://schools.nycenet.edu/offices/teachlearn/gifted/westwardexpansion_Final_Feb1006.pdf