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by Weizsacker, Ernst U. Von; Lovins, Amory B.; Lovins, L. Hunter
by Weizsacker, Ernst U. Von
by Von Weizsacker, Fritz
by Weizsacker, Ernst U. Von; Young, Oran R.; Finger, Matthias
by Weizsacker, Carl Von
by Von Weizsacker, Ernst; Hargroves, Karlson Charlie; Smith, Michael H.; et al.
by Weizsacker, Viktor Von; Busch, Dorrit
by von Weizsacker; Ernst Ulrich
by Von Weizsacker, Ernst U.
by Brauch, Hans G.; Weizsacker, E. U. von