Genera des serpents du Congo et du Ruanda-Urundi.
Tervuren: Musee Royal de l'Afrique Centrale, 1962. Octavo, 15 uncoloured plates, text illustrations. Modern half blue morocco, wrappers retained, a fine copy. More
Tervuren: Musee Royal de l'Afrique Centrale, 1962. Octavo, 15 uncoloured plates, text illustrations. Modern half blue morocco, wrappers retained, a fine copy. More
Tervuren: Musee Royal de l'Afrique Centrale, 1962. Octavo, 15 photographic plates, text illustrations. Modern binder's cloth, wrappers retained, a fine copy. More
Tervuren: Musee Royal de l'Afrique Centrale, 1965. Octavo, 12 photographic plates, text illustrations. Modern binder's cloth, wrappers retained, a fine copy. More