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Vetter, H. 2011 Turtles of the world. Vol. 1. Africa, Europe and Western Asia. 2nd rev. ed. Edition Chimaira, Frankfurt am Main. 152 pp.

Vetter, H. 2002 Turtles of the world. Vol. 1. Africa, Europe and Western Asia. 1st ed. Edition Chimaira & Aqualog Verlag ACS GmbH, Frankfurt am Main & Rodgau. 96 pp.