A. Al-Baker, R., & S. Al-Saleh, H. (2005). Role of Interaction of BA and 2,4 – D in the Growth and Differentiation of the Callus of (Nigella sativa L.) Plants and Their Relation with the Level of Its Effective Compounds. Rafidain Journal of Science, 16(14), 211–224. https://doi.org/10.33899/rjs.2005.43530