Archiv für Naturgeschichte (Nicolai, 1888)

Archives du Muséum d'Histoire Naturelle, Paris - Muséum national d'histoire naturelle (France) (1858)

Catalogue of colubrine snakes in the collection of the British Museum - British Museum (Natural History). Department of Zoology. (Printed by order of the Trustees, 1858)

Catalogue of colubrine snakes in the collection of the British Museum - British Museum (Natural History). Department of Zoology. (Printed by order of the Trustees, 1858)

Catalogue of the snakes in the British Museum (Natural History) / by George Albert Boulenger - Boulenger, George Albert 1858 -1937 (1894)

Catalogue of the snakes in the British Museum (Natural History) / by George Albert Boulenger - Boulenger, George Albert 1858 -1937 (1894)

Catalogue of the snakes in the British Museum (Natural History) / by George Albert Boulenger - Boulenger, George Albert 1858 -1937 (1894)

IUCN Directory of Afrotropical Protected Areas (1987)

IUCN Directory of Afrotropical Protected Areas (1987)

Jornal de sciencias mathematicas, physicas e naturaes - Academia Real das Sciencias de Lisboa. (Academia Real das Sciencias de Lisboa, 1866)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1848)

Proceedings of the Zoological Society of London - Zoological Society of London. (Academic Press, [etc.], 1848)

Smithsonian herpetological information service - Smithsonian Institution (Division of Reptiles and Amphibians, U.S. National Museum, 1991)

The snakes of South Africa : their venom and the treatment of snake bite - Fitzsimons, F. W. (Frederick William), 1875 - (T. M. Miller, 1912)

The snakes of South Africa : their venom and the treatment of snake bite - Fitzsimons, F. W. (Frederick William), 1875 - (T. M. Miller, 1912)

The snakes of South Africa, their venom and the treatment of snake bite - Fitzsimons, F. W. (Frederick William), 1875 - (T.M. Miller, 1921)

The snakes of South Africa, their venom and the treatment of snake bite - Fitzsimons, F. W. (Frederick William), 1875 - (T.M. Miller, 1921)