AL-Sanabani, E. J., Alhadi, F. A., Al-Amary, K. M., & Hussain, M. A. (2018). Effect of Cd and Pb on germination and early seedling growth of black seed (Nigella sativa L.). University of Aden Journal of Natural and Applied Sciences, 22(1), 87–97. https://doi.org/10.47372/uajnas.2018.n1.a07