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Obst, F.J.; Szczerbak, N.N. 1993 Elaphe dione - Steppennatter. pp. 295-315. In: Böhme, W. (ed.). Handbuch der Reptilien und Amphibien Europas. Band 3/I: Schlangen (Serpentes) 1 (Typhlopidae, Boidae, Colubridae 1: Colubrinae). Aula-Verlag, Wiesbaden. 480 pp. |