F. M. Suhail, E. A. Mahdi, and A. H. FAHMI, “RESPONSE OF MAIZE PLANT TO INCULATION BY AZOTOBACTER CHROOCOCCUM BACTERIA ,TRICHODERMA HARZIANUM FUNGI AND NITROGEN FERTILIZER ”, DASJ, vol. 2, no. 1, pp. 162–170, Jun. 2010.