Environmental Law Institute & ebrary, Inc. (1999). Protecting Delaware's natural heritage: Tools for biodiversity conservation. Environmental Law Institute.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रEnvironmental Law Institute और Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Washington, D.C.: Environmental Law Institute, 1999.
एमएलए (9वां संस्करण) प्रशस्ति पत्रEnvironmental Law Institute और Inc ebrary. Protecting Delaware's Natural Heritage: Tools for Biodiversity Conservation. Environmental Law Institute, 1999.
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