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1985. Geological Survey (U.S.). This layer is a digital raster graphic of the 7.5 x 15 Minute USGS topographic map of the Exeter, New Hampshire quadrangle, 1985, which includes ar... United States Geological Survey.
1988. Geological Survey (U.S.). This layer is a digital raster graphic of the 30 x 60 Minute USGS topographic map of the Lowell, Massachusetts quadrangle, 1988. Scale 1:100,000. I... United States Geological Survey.
1816. Harvard Map Collection, Harvard College Library, Carrigain, Philip, 1772-1842., Barralet, John James, ca. 1747-1815., Harrison, William, ca. 1750-1803., and Gilman, John Taylor, 1753-1828, dedicatee. This layer is a georeferenced raster image of the historic paper map entitled: New Hampshire by recent survey : made under the supreme authority an... Harvard Map Collection, Harvard College Library.
1859. Harvard Map Collection, Harvard College Library, Walling, Henry Francis, 1825-1888., Lee & Marsh., H.F. Walling's Map Establishment., and Eaton, L. H. This layer is a georeferenced raster image of the historic paper map entitled: Topographical map of the county of Penobscot Maine, from surveys und... Harvard Map Collection, Harvard College Library.
1857. Harvard Map Collection, Harvard College Library, Chace, J., Swasey & Rowell., Smith & Coffin., Sawyer, G. B., and Sawyer, G. E. This layer is a georeferenced raster image of the historic paper map entitled: Map of Rockingham Co., New Hampshire, by actual surveys by J. Chace,... Harvard Map Collection, Harvard College Library.