Browsing by Subject "shipping"
Now showing items 1-6 of 6
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(Texas Agricultural Extension Service, 1980)
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(Texas Agricultural Experiment Station, 1988)
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(2013-05-10)An average of three to five billion tons of ballast water (BW) is transported globally per year; 79 million tons of which is released into U. S. waters. Ballast water is necessary for large ships to maintain balance and ...
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(Texas Agricultural Extension Service, 1980)
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(Texas Agricultural Experiment Station, 1934)
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(Texas Agricultural Experiment Station, 1978)