Penhallurick, J. M. (2002). The taxonomy and conservation status of the owls of the world: a review. pp. 343-354 in Newton, I., Kavanagh, R., Olsen, J. & Taylor, I. (eds): Ecology and Conservation of Owls. CSIRO Publishing.
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Penhallurick, J. M.
2002
The taxonomy and conservation status of the owls of the world: a review. pp. 343-354 in Newton, I., Kavanagh, R., Olsen, J. & Taylor, I. (eds): Ecology and Conservation of Owls. CSIRO Publishing.