Manga, Veronica Ebot, Bridget Ngeminy Fru, and Godwin Yinda Sendze. “A Study on Heavy Metal Soil Contamination in Cocoa Plantations in South West Region, Cameroon”. Geography, Earth Science and Environment: Research Highlights Vol. 10 (April 23, 2025): 24–40. Accessed July 28, 2026. https://stm.bookpi.org/GESERH-V10/article/view/18056.