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- New London County Historical Society (Conn.)6
- Connecticut5
- Geological Survey (U.S.)3
- Hurd, D. Hamilton (Duane Hamilton)3
- Harwood, Pliny Le Roy, 1876-2
- Marshall, Benjamin Tinkham, 18722
- Williams, William, 1731-18112
- Adams Express Company, seller1
- Arms, Hiram P. (Hiram Phelps), 1799-18821
- Baker, William E.1
- Beers, Ellis & Soule, publisher1
- Beers, F. W. (Frederick W.)1
- Benn, James R.1
- Bolles, Albert Sidney, 1846-19391
- Bromley, Isaac H. (Isaac Hill), 1833-18981
- Campbell, W. H. W.1
- Champion Map Corporation1
- Connecticut. National Resources Center1
- Connecticut. Public Works Dept1
- Connecticut. State Highway Dept1