1. ANDERSON, G.D. 1982. (Revised edition of 1968 paper).A Survey of Soils and Land Use Potential of the Southern and Eastern Slopes of Mt Kilimanjaro, Tanzania. Resource Management Paper no 1, Institute of Resource Assessment, University of Dar es Salaam, and International Develoment Programme, Clark University, Worcester, Massachusets.
2. BRITTON, P.L. (Ed.) 1980 and 1996.Birds of East Africa. East Africa Natural History Society, Nairobi.
3. CHASE, M.K., KRISTAN III, W.B., LYNAM, A.J., PRICE, M.V. & ROTENBERRY, J.T. 2000. Single species as indicators of species richness and composition in California coastal sage scrub birds and small mammals.Conservation Biology14:474–487.
4. KINDT, R. & COE, R. 2005.Tree Diversity Analysis. A Manual and Software for Common Statistical Methods for Ecological and Biodiversity Studies. World Agroforestry Centre (ICRAF), Nairobi.
5. LEGENDRE, P. & LEGENDRE, L. 1998.Numerical Ecology, 2nd edn. Elsevier, Amsterdam.