Roberts (Marine Conservation/Univ. of York; The Unnatural History of the Sea, 2009) warns that "the oceans have changed more in [the] last thirty years than in all of human history before."
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With the collaboration of Koltz (co-author: Leading the Charge: Leadership Lessons from the Battlefield to the Boardroom, 2009, etc.), Powell picks up the thread of his life story.
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