Arthur, Georgina D., Adeyemi O. Aremu, Mack Moyo, Wendy A. Stirk, and Johannes van Staden. “Growth-Promoting Effects of a Seaweed Concentrate at Various PH and Water Hardness Conditions”. South African Journal of Science 109, no. 11/12 (November 27, 2013): 6. Accessed July 22, 2024. https://sajs.co.za/article/view/4019.