Mississippi River. Surface water supply of United States, 1938; pt. 7, Lower Mississippi River basin; Nathan C. Grover, chief hydraulic engineer, D. H. Barber, H. C. Beckman, C. E. Ellsworth, Robert Follansbee, J. H. Gardiner, Berkeley Johnson, J. L. Saunders, C. E. McCashin, J. B. Spiegel, and F. M. Veatch, district engineers.