1. The Leguminosae. A Source Book of Characteristics, Uses and Nodulation;Allen,1981
2. Echinochloa colona (L.) link, a promising species to cultivate salt affected soils in arid lands;Al Sherif;Amer.-Euroasian J. Agric. Environ. Sci.,2007
3. Nitrogen fixation and chemical composition of wild annual legumes at Beni-Suef governorate, Egypt;Al Sherif;Egypt. J. Biol.,2004
4. Nitrogen uptake and assimilation in halophytes;Amonkar,1995
5. Analytical methods for Atomic Absorption Spectrophotometry, 1983. Perkin-Elmer Corp., Norwalk, CT.