METWALLY, SAMI ALI, KHALID ALI KHALID, and BEDOUR H. ABOU-LEILA. “Effect of Water Regime on the Growth, Flower Yield, Essential Oil and Proline Contents of Calendula Officinalis”. Nusantara Bioscience 5, no. 2 (October 16, 2016). Accessed June 19, 2026. https://smujo.id/nb/article/view/902.