| Billerica |
|---|
GP743 Aeromagnetic map of the Billerica Quadrangle, Middlesex
County, Massachusetts. 1971 1:24,000.
HA312 Water resources of the Assabet River basin, central Massachusetts.
1969 1:48,000.
HA371 Flood of March 1968 on the Sudbury, Assabet, and Concord Rivers,
Massachusetts. 1970.
HA614 Hydrology and water resources of the Shawsheen River basin,
Massachusetts. 1980 1:48,000 1:96,000.
HA616 Hydrology and water resources of the lower Merrimack River
basin, Massachusetts, from Concord River,
Lowell, to Plum Island, Newburyport. 1980 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.