Maps. Map of 1st and 2d Berea sands of southeastern Ohio and western West Virginia, shows thickness of sands and oil and gas pools in sands, prepared by J. F. Pepper, D. F. Demarest, W. de Witt, jr., P. Averitt, H. H. Gray, H. H. Mead, R. D. Holt, and C. W. Merrels 2nd, assisted by V. Massarelli and G. Everhart, revised by W. de Witt, jr. and D. F. Demarest; oil and gas investigations prelimary map 79. Scale 5 m.=1.7 in. n. p.