Hanan H. Omar. "PNITROGEN-FIXING ABILITIES OF SOME CYANOBACTERIA IN SANDY LOAM SOIL AND EXUDATE EFFICIENCY ON RICE GRAIN GERMINATION". Egyptian Journal of Phycology, 1, 1 st Int. Symp. Phycol. (ISP). (21-22) Oct. 2000, 2000, 157-167. doi: 10.21608/egyjs.2000.113240