||
http://railroad.lindahall.org/index.html
http://www.lindahall.org/event/breaching-mountains-crossing-deserts-building-first-transcontinental-railroad/
http://www.lindahall.org/event/railroaded-transcontinentals-making-modern-america/
http://cprr.org/Museum/index.html
http://www.pbs.org
http://www.pbs.org/wgbh/americanexperience/features/tcrr-ccrocker/
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