| Lowell |
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B704 Geology of the igneous rocks of Essex County, Massachusetts.
1920.
GP734 Aeromagnetic map of the Lowell Quadrangle, Middlesex and Essex
Counties, Massachusetts, and Hillsborough
County, New Hampshire. 1971 1:24,000.
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.