Joy Stephen Pudza (2020) “Effects of Organic and Inorganic Fertilizers on Some Vitamins and Mineral Contents of Hibiscus Sabdariffa linn (Sorrel)”, Global Journal of Science Frontier Research, 20(C6), pp. 13–19. Available at: https://journalofscience.org/index.php/GJSFR/article/view/2862 (Accessed: 5 May 2024).