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Stone, B. D., C.T., H. & Mabee, S. B. [Draft] Surficial materials map of the Marlborough quadrangle, Massachusetts. Open-File Report (2004).

Hein, C. J., Fitzgerald, D.M,, Barnhardt, W. A. & Stone, B. D. Onshore-Offshore Surficial Geologic Map of the Newburyport East and Northern Half of the Ipswich Quadrangles, Massachusetts. Geologic Map (2010).