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Central California Traction Company (2)
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Chicago & Illinois Midland (3)
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Chicago Aurora & Elgin (5)
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Canadian National (13)
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Canadian Pacific (12)
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Central of Georgia (3)
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Central Railroad of New Jersey (7)
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Central Vermont (6)
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Chesapeake & Ohio (24)
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Chessie System (21)
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Chicago & Eastern Illinois (8)
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Chicago & North Western (16)
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Chicago Burlington & Quincy (9)
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Chicago Great Western (7)
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Chicago, Indianapolis, and Louisville Railway (7)
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Chicago, Milwaukee, St. Paul and Pacific (13)
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Chicago, Rock Island and Pacific (12)
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Clinchfield (14)
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Colorado Midland (5)
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Conrail (6)
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CSX (30)
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Other C's (34)
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Chicago St. Paul Minneapolis & Omaha Railway (2)
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Chicago North Shore & Milwaukee Railroad (4)