1. Pollen et Spores d'Afrique tropicale,1974
2. Topographic map: Lake Nyassa;Army Map Service,1954
3. Recent and possible future mathematical developments in quantitative palaeoecology;Birks;Palaeogeogr. Palaeoclimatol. Palaeoecol.,1985
4. Some reflections on the application of numerical methods in Quaternary palaeoecology;Birks,1992
5. Numerical Methods in Quaternary Pollen Analysis;Birks,1985