“Diversity and Abundance of Earthworms in Cocoa Plantations With Different Shade Trees”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 37, no. 3 (December 27, 2021): 207–218. Accessed April 30, 2026. https://mail.ccrjournal.com/index.php/ccrj/article/view/483.