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Boxcar - Wikipedia
UP: What Is a Boxcar Rail Car? - Union Pacific
Boxcars: Once Railroading's Ubiquitous Rail Car - American-Rails.com
What Are All of the Different Rail Car Types? - Union Pacific
The Story of IPD Boxcars - YouTube
The 8 Most Common Types of Rail Cars for Freight Shipping
Freight car classifications | Trains Magazine
BNSF 3D Trains - BNSF Railway
The Rise, Fall, and Future of the Railroad Boxcar - R2 Logistics
Freight car trucks and carbodies | Trains Magazine