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by McKibben, Bill
by Thoreau, Henry David; McKibben, Bill
by Kemal, Yashar; McKibben, Bill; Platon, Margaret E.
by Cousteau, Jacques; Schiefelbein, Susan; McKibben, Bill
by Delsaux, Cedric; Lovelock, James; Maathai, Wangari; et al.
by Hernan, Robert Emmet; McKibben, Bill; Nash, Graham
by Seidl, Amy; McKibben, Bill
by Earle, Sylvia A.; McKibben, Bill