Farahani, H. A., A. Valadabadi, and N. Rahmani. “EFFECTS OF NITROGEN ON OIL YIELD AND ITS COMPONENT OF CALENDULA (CALENDULA OFFICINALIS L) IN DROUGHT STRESS CONDITIONS”. African Journal of Traditional, Complementary and Alternative Medicines 6 (April 22, 2009): 336–337. Accessed December 21, 2024. https://journals.athmsi.org/index.php/ajtcam/article/view/674.