WASET
Akrim, H. , Edkymish, A. , Gryani, N.. "The Efficiency of Irrigation System and Nitrogen Fixation for inoculated Soybeans by using N15 Tracer Techniques". World Academy of Science, Engineering and Technology, Open Science Index 64, International Journal of Agricultural and Biosystems Engineering (2012), 6(4), 118 - 123.