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RL32450.pdf
RL32450.pdf
http://www.ncseonline.org/NLE/CRSreports/07Dec/RL32450.pdf
Environmental impact of shipping
Sailing ballast
Act to Prevent Pollution from Ships
Ballast water regulation in the United States
Cruise ship pollution in the United States
Link from a Wikipage to an external page
RL32450.pdf
http://www.ncseonline.org/NLE/CRSreports/07Dec/RL32450.pdf