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1988. Geological Survey (U.S.). This layer is a digital raster graphic of the 7.5 x 15 Minute USGS topographic map of the Ashburnham, Massachusetts quadrangle, 1988. Scale 1:25,00... United States Geological Survey.
1988. Geological Survey (U.S.). This layer is a digital raster graphic of the 7.5 x 15 Minute USGS topographic map of the Athol, Massachusetts quadrangle, 1988. Scale 1:25,000. Th... United States Geological Survey.
1887. Harvard Map Collection, Harvard College Library. This layer is a digital raster graphic of the historic 15-minute USGS topographic map of the Fitchburg, Massachusetts quadrangle. The survey date (...
1988. Geological Survey (U.S.). This layer is a digital raster graphic of the 7.5 x 15 Minute USGS topographic map of the Fitchburg, Massachusetts quadrangle, 1988. Scale 1:25,000... United States Geological Survey.
1855. Harvard Map Collection, Harvard College Library, Osborne, D. S., and Woodford, E. M. This layer is a georeferenced raster image of the historic paper map entitled: Map of the town of Gardner, Worcester Co., Mass., from actual survey... Harvard Map Collection, Harvard College Library.
1855. Harvard Map Collection, Harvard College Library, Osborne, D. S., and Woodford, E. M. This layer is a georeferenced raster image of the historic paper map entitled: Map of the town of Gardner, Worcester Co., Mass., from actual survey... Harvard Map Collection, Harvard College Library.
1986. Geological Survey (U.S.). This layer is a digital raster graphic of the 30 x 60 Minute USGS topographic map of the Keene, New Hampshire quadrangle, 1986, covering also porti... 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.
1887. Harvard Map Collection, Harvard College Library. This layer is a digital raster graphic of the historic 15-minute USGS topographic map of the Winchendon, Massachusetts quadrangle. The survey date ...