
A photo essay with commentary.
PMA_2025_080046
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A history.
PMA_2026_093725

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A technical study of rail locomotive mechanical structure and components.
PMA_2026_093726

A technical study of rail locomotive mechanical structure and components.
PMA_2026_093727

A history of the development of North American railroads.
PMA_2026_092851

A history of the development of North American railroads.
PMA_2026_092852
A biography.
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