1. Cellulase of fungus-growing termites: a new hypothesis on its origin;Abo-Khatwa;Experientia,1978
2. Soil organic matter and its role in crop production;Allison,1973
3. FAO/UNESCO soil map of the world;Anonymous,1974
4. Soil-Plant relationships;Black,1968
5. Pemières études pédologique et bactériologique des termitières;Boyer;C. R. Aca. Sci. Paris,1955