- G.W. & C.B. Colton & Co
- Digital Commonwealth
- Boston Public Library
- G.W. and C.B. Colton
Also shows land survey parcels. Includes continuation inset of the southern part. Entered according to Act of Congress in the year 1868 by G.W. & C.B. Colton ...
- No known copyright restrictions. This work is licensed for use under a Creative Commons Attribution Non-Commercial Share Alike License (CC BY-NC-SA).