An edition of Giant salvinia (2011)

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

By United States. Congress. House. Committee on Natural Resources. Subcommittee on Fisheries, Wildlife, Oceans, and Insular Affairs