BIJLSMA RG (1994) Boekbespreking: Butler, D. ... etal., The Black Robin; saving the world. LIMOSA 67 (4): 181-181.

BUTLER D. & MERTON D. 1992. The Black Robin: saving the world's most endangered bird. Oxford University Press, Auckland. 294 p. ISBN 0.19.558260.8.

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