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1989. Geological Survey (U.S.). This layer is a digital raster graphic of the 30 x 60 Minute USGS topographic map of the Albany, New York quadrangle, 1989, covering also portions ... United States Geological Survey.
1858. Harvard Map Collection, Harvard College Library, Chace, J., Custer, E., delineator., and Smith, Mason & Co. This layer is a georeferenced raster image of the historic paper map entitled: Map of Hillsboro Co., New Hampshire, from actual surveys by J. Chace... Harvard Map Collection, Harvard College Library.
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.