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Title: The Harbor of New London.
Publisher: USCS, .
Notes: Founded upon a Trigonometrical Survey under the direction of F.R. Hassler, Superintendent of the Survey of the Coast of the United States. Triangulation by E. Blunt. Topography by F.H. Gerdes and J.B. Glück. Hydrology by the party under the command of G.S. Blake.