| Ashby |
|---|
GP730 Aeromagnetic map of the Ashby Quadrangle, Middlesex and
Worcester Counties, Massachusetts, and
Hillsborough County, New Hampshire. 1971 1:24,000.
HA276 Water resources of the Nashua and Souhegan River basins, Massachusetts.
1977 1:48,000.
MF959 Reconnaissance bedrock geology map of the Fitchburg Quadrangle
and part of the Ashby Quadrangle,
Northeast-central Massachusetts. 1978 1:24,000.