Water Pollution -- 1969. hearings before the United States Senate Committee on Public Works, Subcommittee on Air and Water Pollution, Ninety-First Congress, first session, on Feb 27, 28, Mar 3, 10, May 20, 23, June 4, 1969. Part 4 :

Committee Serial No. 91-2. Considers S. 7 and S. 544, to amend the Federal Water Pollution Control Act. Appendix (p. 1543-1586) contains transcript of subcommittee May 20, 1968 executive session hearing.