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spheniscidae

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Cover of And Tango Makes Three by justin richardson,peter parnell

And Tango Makes Three

By Justin Richardson,Peter Parnell

Visual and vocal signals in penguins, their evolution and adaptive characters

Visual and vocal signals in penguins, their evolution and adaptive characters

By P. Jouventin

Cover of Our iceberg is melting by john p. kotter

Our iceberg is melting

By John P. Kotter