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hbw.com
Yosef, R. & International Shrike Working Group: Masked Shrike (Lanius nubicus). [w:] del Hoyo, J., Elliott, A., Sargatal, J., Christie, D.A. & de Juana, E. (red.). Handbook of the Birds of the World Alive [on-line]. Lynx Edicions, Barcelona, 2008. [zarchiwizowane z tego adresu (2014-12-02)].
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