Additional "Zephyr" Links
American Experience | Streamliners https://www.pbs.org/wgbh/americanexperience/features/streamliners-zephyrs/
History of the Mark Twain Zephyr, Chicago, Burlington & Quincy http://www.gatewaynmra.org/articles/mt-zephyr.htm
Pioneer Zephyr www.msichicago.org/whats-here/exhibits/pioneer-zephyr/