Bibliography

See G. Laycock, The Sign of the Flying Goose: A Guide to the National Wildlife Refuges (1965); R. Murphy, Wild Sanctuaries (1968); D. W. Ehrenfeld, Conserving Life on Earth (1972); N. Grove, Wild Lands for Wildlife (1984).

The Columbia Electronic Encyclopedia, 6th ed. Copyright © 2007, Columbia University Press. All rights reserved.

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