Cherpitsky Oleksandr Zinovevich. Ecology-Economic Mechanisms of Land Resources Protection Against Degradation Processes in Market Conditions : к.геогр.н. : spec.. 11.00.02 - Економічна та соціальна географія : presented. 2006-12-18; popup.evolution: .; Taras Shevchenko Kiev University. – , 0406U005123.

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