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Cartwright, H.M. Factor Four: Doubling Wealth, Halving Resource Use. By Ernst von Weizsacker, Amory B. Lovins, and L. Hunter Lovins; Earthscan: London, England; 1998. 9 pounds 99 p. ISBN softcover 1 85383 406 8, xxix + 322 pp, 46 Figures, 15 color plates. Chem. Educator 4, 203–204 (1999). https://doi.org/10.1007/s00897990321a
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DOI: https://doi.org/10.1007/s00897990321a