Charts. New Hampshire-Massachusetts, Portsmouth to Cape Ann, surveys to 1928, surveys by U. S. Engineers to 1921 and other sources; chart 1206. Scale 1:80,000.
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New Hampshire-Massachusetts, Portsmouth to Cape Ann, surveys to 1928, surveys by U. S. Engineers to 1921 and other sources; chart 1206. Scale 1:80,000.
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Charts. New Hampshire-Massachusetts, Portsmouth to Cape Ann, surveys to 1928, surveys by U. S. Engineers to 1921 and other sources; chart 1206. Scale 1:80,000.