WASET
Howladar, S. , Rady, M. , Osman, A. (2013). 'Effect of Bio-Nitrogen as a Partial Alternative to Mineral-Nitrogen Fertiliser on Growth, Nitrate and Nitrite Contents, and Yield Quality in Brassica oleracea L.'. World Academy of Science, Engineering and Technology, Open Science Index 79, International Journal of Agricultural and Biosystems Engineering, 7(7), 578 - 583.