The operation of water treatment facilities for the metropolitan Washington area : hearings before the Subcommittee on Water Resources and Environment of the Committee on Public Works and Transportation, House of Representatives, One Hundred Third Congress, first and second sessions, December 20, 1993 and June 20, 1994
U.S. G.P.O. : For sale by the U.S. G.P.O., Supt. of Docs., Congressional Sales Office,
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GOVDOCS Y 4.P 96/11:103-43