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History of American railways, with special emphasis on the man factor in their development
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/historyofamerica00newc
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Papers
...(CC0 1.0) This content is in the public domain (free of copyright restrictions). You can copy, modify, and distribute this...
https://library.si.edu/digital-library/book/papers00newc
