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John Benjamin Henck
Books by John Benjamin Henck
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Field-book for railroad engineers: Containing formulæ for laying out curves, determining frog angles, levelling, calculating earth-work, etc., etc., ... and natural sines, tangents, etc., etc.
John Benjamin Henck
University of Michigan Library
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Field-book for railroad engineers.: Containing formulæ for laying out curves, determining frog angles, levelling, calculating earth-work... (1871)
John Benjamin Henck
Hard Press
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