GP740 Aeromagnetic map of the Shirley Quadrangle, Worcester and Middlesex
Counties, Massachusetts. 1971
1:24,000.
HA276 Water resources of the Nashua and Souhegan River basins, Massachusetts.
1977 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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