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              Boulding, K. E. (1966). The economics of the coming spaceship earth. In H. Jarrett (Ed.), Environmental quality in a growing economy (pp.3-14). Baltimore, MD: The John Hopkins University Press.
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              Boulding, K. E. (1966): The Economics of the Coming Spaceship Earth. In: Jarrett, H. (Hg.): Environmental Quality in a Growing Economy, Essays from the Sixth RFF Forum on Environmental Quality. Baltimore, 3-14.
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              Boulding, K. e. (1966): The Economics of the Coming Spaceship. In: Jarrett, H. (ed.): Environmental Quality in a Growing Economy. Essays from the Sixth RFF Forum on Environmental Quality. Baltimore, 3-14.
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