Ohio River. Surface water supply of United States, 1939: pt. 3, Ohio River basin; Carl G. Paulsen, acting chief hydraulic engineer, E. D. Burchard, J. J. Dirzulaitis, H. E. Grosbach, A. W. Harrington, A. H. Horton, William Kessler, J. W. Mangan, C. E. McCashin, J. H. Morgan, F. M. Veatch, J. V. B. Wells, and C. V. Youngquist, district engineers.