sari, N., R. Widyastuti, and S. Abdoellah. “Diversity and Abundance of Earthworms in Cocoa Plantations With Different Shade Trees”. Pelita Perkebunan (a Coffee and Cocoa Research Journal), Vol. 37, no. 3, Dec. 2021, pp. 207-18, doi:10.22302/iccri.jur.pelitaperkebunan.v37i3.483.