THE NATIONAL RAILROAD... openyls.law.yale.edu

United States Railroad... en.wikipedia.org

Chapter 3 - Enabling... nap.nationalacademies.org

Amtrak Board of Directors –... trainsinthevalley.org

Chapter 3 - Enabling... nap.nationalacademies.org

PDF) Urban Rail and Troy,... www.academia.edu

Train accident america... www.alamy.com

http://... www.govinfo.gov

Railroad sabotage hi-res... www.alamy.com

MRH January 2011 - Issue 11... issuu.com

1880s train usa hi-res... www.alamy.com

The Heritage of America's... home.nps.gov

Train accident america... www.alamy.com

Amtrak Reports – All Aboard... sites.northwestern.edu

Amtrak Board of Directors –... trainsinthevalley.org

Civil Aeronautics Board -... en.wikipedia.org

91q8Fh10yyL._AC_UF1000, ...... www.amazon.com

PDF) Historic Resource... www.academia.edu

19th century transport... www.alamy.com

Amtrak Board of Directors –... trainsinthevalley.org