Aeromagnetic map of part of the Caucomgomoc Lake quadrangle, Somerset and Piscataquis Counties, Maine / Department of the Interior, United States Geological Survey ; by R.W. Bromery, N.S. Tyson, and others. - Bromery, Randolph Wilson, 1926-; Tyson, Natalie S. (Geophysical investigations (Geological Survey (U.S.)), 1963)