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Canal - Wikipedia
Panama Canal: History, Definition & Canal Zone - HISTORY
Canal Definition & Meaning - Merriam-Webster
Erie Canal | Definition, Map, Location, Construction, History,
The Canal Era - National Canal Museum
Panama Canal | Definition, History, Treaty, Map, Locks, & Facts
canals and inland waterways - Encyclopedia Britannica
What is a canal? - NOAA's National Ocean Service
About – National Canal Museum - National Canal Museum
Structures description - The American Canal Society