Maps. Ohio. Map of 1st Berea sand in southeastern Ohio and western West Virginia, oil and gas investigations, preliminary map 9 [with text]; prepared by J. F. Pepper, P. Averitt, D. F. Demarest, W. deWitt, jr., H. H. Gray, R. D. Holt, H. H. Mead, and C. W. Merrels, 2nd, assisted by Violet Massarelli and Gail Everhart. Scale 25 m.=8.3 in.