Environmental stewardship and ecological protection
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ECOLOGICAL ECONOMICS:SUSTAINABILITY IN PRACTICE
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Ecological task analysis and movement
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Ecological Perspectives In Behavior Analysis
ed.by Ann Rogers-Warren and Steven F. Warren1977 年出版249 页ISBN：0839111487
Ecological Networks in an Agricultural World
Volume 492013 年出版506 页ISBN：0124200029
Ecological Restoration in International Environmental Law
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