Giant salvinia : how do we protect our ecosystems? : oversight field hearing before the Subcommittee on Fisheries, Wildlife, Oceans, and Insular Affairs of the Committee on Natural Resources, U.S. House of Representatives, One Hundred Twelfth Congress, first session, Monday, June 27, 2011, in Shreveport, Louisiana.
Washington : U.S. G.P.O. : For sale by the Supt. of Docs., U.S. G.P.O., 2011.