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Conservation of natural resources - Great Lakes Region.
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1 作品在 0 項出版品 0 種語言
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The ecosystem approach : = scope and implications of an ecosystem approach to transboundary problems in the Great Lakes basin : special report to the International Joint Commission, presented July 1978 /
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Conservation of natural resources- Great Lakes Region.
Ecology- Great Lakes Region.
Ecology- Research- Great Lakes Region.
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