topic

• Water-supply8
• Reservoirs4
• Watersheds4
• Aqueducts3
• Rivers3
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name

• New York (N.Y.). Aqueduct Commission3
• Smock, John C. (John Conover), 1842-19263
• Welcke, Robert A3
• Craven, Alfred Wingate, 1810-18792
• Cushing, G. A2
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collection

• Maps of New York City and State9
• Maps of North America3

place

• New York (State)9
• Croton River Watershed (N.Y.)7
• Croton Aqueduct (N.Y.)6
• New Jersey4
• New York4
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genre

• Maps12
• Geological maps2
• Topographic maps2

publisher

• Geological Survey of New Jersey3
• Aqueduct Commission?2
• Croton Aqueduct Board2
• American Public Health Association1
• Hurd and Houghton1
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division

• Map Division12

type