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      <marc:subfield code="a">Hartwick, John M.</marc:subfield>
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      <marc:subfield code="a">Degradation of environmental capital and national accounting procedures </marc:subfield>
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      <marc:subfield code="a">"This paper provides a rigorous mathematical/theoretical foundation for the conceptualization of the "natural environment" as a wastable capital stock. The treatment has important implications for the measurement of degradation (and enhancement) of environmental capital in relation to "adjusted" calculations of net national product and its corresponding growth rate"--Foreword, p. ix.</marc:subfield>
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