Hulupi, Retno, Mulyadi ., and Bekti Andayani. 2006. “Distribution of Radopholus Similisand Pratylenchus CoffeaeNematodes in Coffee Plantation”. Pelita Perkebunan (a Coffee and Cocoa Research Journal) 23 (3). https://doi.org/10.22302/iccri.jur.pelitaperkebunan.v23i3.41.