Ohio River. Comprehensive flood control plan for Ohio and lower Mississippi rivers, hearings, 75th Congress, 1st session, on levees and flood walls, Ohio River basin, H. R. 7393 and H. R. 7646. [bills] to amend act authorizing construction of certain public works on rivers and harbors for flood control, approved June 22, 1936; June 7-18, 1937.

Tools