Maps. Ohio. Map of 2d Berea sand in Gallia, Meigs, Athens, Morgan, and Muskingum Counties, Ohio, oil and gas investigations, preliminary map 5 [with text]; prepared by J. F. Pepper, D. F. Demarest, R. D. Holt, W. de Witt, jr., H. H. Gray, H. H. Mead, C. W. Merrels, 2nd, and P. Averitt, assisted by Violet Massarelli and Gail Everhart. Scale 5 m.=1.7 in.