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Population density map of the United States.
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Population density maps of the individual states.
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Map of the Paulins Kill river basin.
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Map of the Lehigh Canal
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Map of the Delaware and Hudson Canal
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Map of the New York City harbor railroads in the early 20th century.
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Map of the Jersey City terminal of the Lehigh Valley Railroad
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Map of the High Bridge Branch of the Central Railroad of New Jersey
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Map of the historical route of the New York, Susquehanna and Western Railway
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Map of the New Jersey Southern Railroad
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Map of the Ogden Mine Railroad.
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Maps of the Delaware and Hudson Gravity Railroad.