1. Associations polliniques actuelles et Quaternaires en Ethiopie (Vallees de l'Awash et de l'Omo);Bonnefille,1972
2. Palynological evidence for an important change in the vegetation of the Omo basin between 2·5 and 2 million years;Bonnefille,1976
3. Evolutionary history of the Cercopithecidae;Delson;Contributions to Primatology,1975
4. Cercopithecoidea from Omo Group deposits;Eck,1976
5. The fossil cercopithecoids of Makapansgat and Sterkfontein;Eisenhart;Thesis, Harvard University,1974