Studies of the psychology and behaviour of captive animals in zoos and circuses /

By Hediger, Heini.. London : Butterworths Scientific Publications, 1955 , Translation of Skizzen zu einer Tierpsychologie im Zoo und in Zirkus.

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Wild animals in captivity

By Hediger, Heini.. New York, Dover Publications 1964 , "An unabridged and unaltered republication of the English translation first published ... in 1950."

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University of Zambia Library Search for 'au:"Hediger, Heini."'

Studies of the psychology and behaviour of captive animals in zoos and circuses /

Wild animals in captivity