Caro, Timothy M. Conservation by Proxy : indicator, umbrella, keystone, flagship, and other surrogate species / Tim Caro. -- Washington : Island Press, 2010. -- xvi, 374 s. : obr., tab., graf. ; 24 cm. -- ISBN 978-1-59726-192-0 (viaz.) : 60,65 Eur. -- ISBN 1-59726-192-0

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