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Jon R. Roma: Spring Hill manipulation chart
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Jon R. Roma: Belt Jct. manipulation chart (in Spring Hill Tower)
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Jon R. Roma: Belt Jct. control machine
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Jon R. Roma: Belt Jct. and Spring Hill model board
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Jon R. Roma: Spring Hill special instructions
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Jon R. Roma: Spring Hill Tower
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Jon R. Roma: Spring Hill levers
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Jon R. Roma: Spring Hill dispatcher