Tan Sek Yee, Yusof Ibrahim, and Dzolkhifli Omar. 2008. “EFFICACY OF BACILLUS THURINGIENSIS BERLINER SUBSPECIES KURSTAKI AND AIZAWAI AGAINST THE BAGWORM, METISA PLANA WALKER ON OIL PALM ”. Tropical Life Sciences Research 19 (1): 103–114. https://ejournal.usm.my/tlsr/article/view/tlsr_vol19-no-1-2008_8.