01188cam a22003011 4500 gs 67000152 DLC 20260227111420.0 851010s1967 dcuab b 00010 eng c gs 67000152 //r922 U.S. Geol. Survey Libr. DLC DLC n-us-me QE75 .P9 no. 527 QE120.A7 E4 Copy 2. 557.41/1 Ekren, E. B. (Einar Bartlett), 1923- Geological-geophysical investigations of bedrock in the Island Fall quadrangle, Aroostook and Penobscot Counties, Maine, by E.B. Ekren and F.C. Frischknecht. Washington, U.S. Govt. Print. Off., 1967. iv, 36 p. illus., maps (2 fold. col. in pocket) 29 cm. Geological Survey professional paper 527 Bibliography: p. 35-36. Geology Maine Aroostook County. Geology Maine Penobscot County. Geophysics Maine Aroostook County. Geophysics Maine Penobscot County. Frischknecht, Frank C., joint author. Island Falls quadrangle, Aroostook and Penobscot Counties, Maine. 30304 30304