Abdel-Kareem, A., El-Shamy, H., Dawh, A., Gwiefel, S. (2017). 'MILK THISTLE GROWTH, PRODUCTIVITY AND CHEMICAL CONSTITUENTS AS AFFECTED BY FOLIAR APPLICATION OF PHENYLALANINE AND TRYPTOPHAN', Zagazig Journal of Agricultural Research, 44(1), pp. 117-127. doi: 10.21608/zjar.2017.53932