1 | 1- Paul, E.A., 2007. Soil Microbiology, Ecology and Biochemistry. |
2 | 2- Coleman, D.C., Crossley Jr, D.A., Hendriz, P.F., 2004. Fundamentals of Soil Ecology. |
3 | 3- Killham, K., 1994. Soil Ecology, Cambridge University Press, 242 p. |
4 | 4- Dindal D., 1990. Soil Biology Guide. NY: Wiely |