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Zoos in the 21st century : catalysts for conservation? / edited by Alexandra Zimmermann, Matthew Hatchwell, Lesley A. Dickie, Chris West  Cambridge : Cambridge University Press, 2007 . xii, 373 stran . ISBN 978-0-521-61858-8 (brožováno). ISBN 978-0-521-85333-0 (vázáno) .   [1, currently available 1]