GP701 Aeromagnetic map of the Wachusett Mountain Quadrangle, Worcester
County, Massachusetts. 1970 1:24,000.
HA249 Ground-water favorability of the Connecticut River basin, New
England States. 1967 1:250,000.
HA276 Water resources of the Nashua and Souhegan River basins, Massachusetts.
1977 1:48,000.
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