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Soil and Water Resources: Research Priorities for the Nation ,
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Policy: Alternatives and Consequences of Conservation Techn..:
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Handbook of natural resource and energy economics / edited by Allen V. Kneese and James L. Sweeney
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Chapter 13 Land resources and land markets:
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Chemistry of Heterocyclic Compounds: A Series Of Monographs; Chemistry of Heterocyclic Compounds ,
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