Published in Revue zoologique africaine, in 1921, in volume 8, pages 87-106

Published in Revue zoologique africaine, in 1921, in volume 9, pages 1-22

Published in Revue Zoologique Africaine, in 1921, in volume 9, pages 29-32

Published in Revue Zoologique Africaine, in 1921, in volume 9, pages 87-192

Published in Rev. zool. afr., in 1921, in volume 9, pages 193-196

Published in Revue Zoologique Africaine, in 1921, in volume 9, pages 235-251

Published in Revue Zoologique Africaine, in 1921, in volume 9, pages 252-253