GP732 Aeromagnetic map of the Pepperell Quadrangle, Middlesex County,
Massachusetts, and Hillsborough County, New Hampshire. 1971 1:24,000.
GQ1118 Surficial geologic map of the Pepperell Quadrangle, Middlesex
County, Massachusetts, and Hillsborough County, New Hampshire. 1973 1:24,000.
HA276 Water resources of the Nashua and Souhegan River basins, Massachusetts.
1977 1:48,000.
HA662 Hydrology and water resources of tributary basins to the Merrimack
River from Salmon Brook to the Concord
River, Massachusetts. 1985 1:48,000.
MF957 Bedrock geologic map of the Pepperell, Shirley, Townsend quadrangles
and part of the Ayer quadrangle, Massachusetts. 1978. 1:24,000.
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