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Biofertilizers and their Effect on the Microbial Biomass in the Rhizosphere of Certain Crops Using Nuclear Techniques: Thesis Submitted in Partial Fulfillment of Requirements for the M.Sc. Degree in Microbiology / by Ahmed Mohamed Nabil Abdel Raouf; Under Supervision of Mohamed El-Sayed Osman, Ismail A. El-Ghandour, Yehia G. M. Galal.
- 579
- Abdel Raouf, Ahmed Mohamed Nabil.
- Helwan University,
- 2001.
- Cairo :