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Book Description paperback. Condition: New. Paperback Pages Number: 178 Language: Chinese. Henan Province. land resources. ecological security theory. method and practice of the upper and lower two. On sustainable use of land resources in Henan Province study on ecological security. including the ecological security of the basic theory and progress. Henan Province land resource utilization trend. the trend analysis of ecological security and ecological security assessment index system constructed and dynamic evaluation. For instance ne. Seller Inventory # N10880