Discusses the three kinds of symbiosis: mutualism, commensalism, and parasitism and describes examples of these relationships.

Symbiosis 2007, Twenty-First Century Books (CT), Minneapolis, MN

ISBN-13: 9780822567998

Hardcover

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Symbiosis 2005, Twenty-First Century Books (CT), Brookfield,Conn

ISBN-13: 9780761330011

Hardcover

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