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Spawls, S.; Howell, K.M.; Hinkel, H.; Menegon, M. 2018 Field Guide to East African Reptiles. 3rd ed. Cristopher Helm, London. 624 pp.

Spawls, S.; Howell, K.; Drewes, R.C.; Ashe, J. 2002 A field guide to the reptiles of East Africa: Kenya, Tanzania, Uganda, Rwanda and Burundi. 1st ed. Academic Press, London & California. 543 pp. (Reprinted with corrections in 2004).