Ade Safitri, Nirwana Anas, and Khairuna, “DEVELOPMENT OF BIOLOGY E-BOOK TEACHING MATERIALS BASED ON LOCAL POTENTIAL IN ASAHAN DISTRICT ON ECOSYSTEM MATERIALS FOR CLASS X SMA/MA STUDENTS AT SMA NEGERI 1 PULAU RAKYAT”, IJERLAS, vol. 3, no. 5, pp. 1628–1634, Jul. 2023.